Adventurers Hall is really good news to me. I love the BG style of companions, I love how they interact, but what I hate about it is that you sometimes have to choose a ratbarstard henchman your character/party does't like because of his abilities. Sure, there is this whole community of purpose feel to it which can be entertaining, but tbh in a huge fantasy city you'd most probably find a similar dude that fits you better. Of course the game doesn't provide that depth, so it's just fine being able to hire a merc.
Or, in this case, create your own guy with his own background. It's a great idea to mix it up, so you won't have 6 deaf-mute morons slaughtering through the game but some cool scripted interaction but a party that makes sense to you. It would be cooler to have less optional party members in the game, but those who're there should be deep.
Another big point is, I don't like releoading because one of my party members died and I'm not able to ress him at that point. I want to give them the chance of a super-heroic death. If my party fought a super tough fight and everything went well except the lichmaster casting finger of death right before we could end him, well, that's what happens. So I will be happy to replace my fallen by someone being able to have the same function in my party.
This btw would be really fantastic: The chance of a final dialogue with the fallen partymember, at any point during the game, given the fact that you can't revive in that situation. So you don't just feel like "whoops, ****, forgot that healing potion macro again *reload*" or "wow, what an honorable death, he saved us all *sniff* *rightclick* "now I need to redistribute his ****, *click, click*" but being able to say goodbye to that character.