Responses.
1) 5 vs 6 person party. I can life with it either way. I find 6 person parties more fun because it's easier to build a party for the long haul. With 6person parties, I like to have a core of 5: a couple of front line tanks, a priest, a spellcaster (cipher or wizard), and a ranged weapon specialist, while leaving the 6th slot for either a jack of all trades character, or as a character I'm using for a specific purpose in a specific battle (like someone built to help the part deal with fampyrs). But with a 5 person party, it gets a good deal trickier, and I tend to lose the jack of all trades character.
2) Persistent level cap. Yes and no. I think that the problem with the DLCs is that the game is balanced for how it was released. And when the "normal" PoE1&2 DLCs are added, you end up with characters who could be might be much more powerful by the time you're making your stretch run for the final battle. I wish that the DLCs were more like the BG2 Throne of Baal expansion which was appended to the core game, AFTER the final battle of BG2 was fought. This way, you don't really have to worry about screwing up the core game with DLCs and a raised level cap. The expansion would have a higher level cap, and you couldn't reach it until after completing the main story line.
3) Nature of the Gods: Personally, I'd rather see a PoE3 ignore the Gods completely. I'm quite bored with the Eoran gods being central to the story.
4) skipped
5) Purple prose: Honestly, it never bothered me.
6) More companions, less open world. These should be two items. More companions, definitely. Less open world, I described how I'd like to see this accomplished in a post elsewhere. What I don't want to see is the game being like IWD1 or 2 where the storyline OBVIOUSLY forced the player down a super narrow path. This was super boring after a while. What would work much better is having a number of larger strategic level maps that covered, perhaps, different countries. And so long as that part of the story stayed in that country, it was open. But at some point, the main storyline would require you to go from country A to country B. And once in country B, you couldn't return to country A. You stayed in country B's open world working the storyline and whatever side quests existed, until it was time to move onward to country C. Rinse and repeat as necessary.
7) More companion banter and dialog, etc. Meh, I don't really care for this, because I foresee it eating up a lot of the budget due to voiceovers, which IMO should be cut wayyyyyy back. To me, voice overs are a waste of money that would be better spent on actual content, rather than pandering to people to lazy to read.
Moving on to "Things I thought that were massive improvements from POE that I do not want to see replaced or removed:"
1. Spells and abilities being per encounter rather than per rest. Personally, I don't think that this was an improvement at all. Honestly, I didn't like this entire part of the new PoE2 combat system. I think that magic is vastly more fun when its use is limited and the player has to manage his limited uses of those things.
2. HP recovery and rest, etc. I kind of feel the same about this as I do about point #1. I like having to manage limited resources. However, regarding resting, thinking back to PoE1, I'm not really sure what "resting supplies" really are? Campfire wood? You can rest without a fire or even a fire to cool. There's plenty of food that can be eaten cold, and probably would be if you were in a dangerous area where lighting a fire could attract dangerous creatures. Blankets? While having a blanket would be nice, I don't see it as a consumable supply. Blankets seem more like something any experienced traveler would have as part of his travel "kit".
As for where one could rest in the wild, it seems to me that resting in an area that hasn't been completely cleared would either not be allowed or come with the risk of being attacked by wandering monsters local to that area. On the other hand, say that you were on the 3rd level of a dungeon, but you'd cleared the 2nd level, I'd think that you should be able to rest safely on the 2nd level.
Side note: It annoyed me that the party could be on the PC's ship and be making a long voyage, but not be considered rested. Seriously, you'd think that your party could be resting most of such a journey, barring moving through a storm. My thinking was that if you'd been at sea for at least 1 day uninterrupted, the party should have been considered fully rested. /side note
3. Romances: They could remove romances as far as I'm concerned.
4. Unique magical items: I think that greater effort should be put into making certain that there are at least 4 different weapons, shields, and armor for each type.
4a. Generic magical weapons/armor: Honestly, it annoyed me that there was so damned many +3 or higher magical weapons (I don't remember the proper adjectives for the different levels of enhancement) and armor. It seems to me that anything that's (probably) +2 or higher is extremely costly to make, and really is far too good for regular troops. Now, I suppose that the Devs may have seen these generic super enhanced armors and weapons as substitutes for other things like jewels or coins as a way to provide rewards. Personally, I'd rather just get the jewels and currency, though there may be other ways to do this. In the game Pathfinder, I think that they have a system where you can find valuable relics. Now these relics can be sold at a regular merchant, but for much below their proper value. What you apparently needed to do is find some sort of special merchant who deals in such relics and would give you top dollar for them. This could be an interesting mechanic.
5. Companions helping pass dialog checks: I agree 100000%.
6+7: Agree on these two as well.