Upgraded base types and cultural flavors
I think that armors should be varied and definitely have various cultural flavors within the game. And I think that these various 'flavors' of armors should be adjusted versions of the base armors, that you can then enchant in a forge or the like. This gives that nice feeling of, you've managed to fight through an ancient ruin and found an excellent nonmagical leather armor, one created using leatherworking styles and craftmanship that no longer exists, one that's still in prime condition after hundreds of years in this... This tomb. So maybe that was the only treasure you found there, or one of a few, and yet it's still something to be really excited about, since you can then enchant this armor and make one of the best armors in the entire game. Definitely the best light armor in the game. That gives a really nice sense of accomplishments when you've done all those different parts right, and you get the final reward.
Wizards in armor
I definitely agree with the decision to make wizards able to wear armor, but that such wizards are a different type than 'normal' wizards. Perhaps more like a battle mage styled caster, who can hold its own in melee if needed, especially once he or she gets some enchantment spells going. Having lots of fun, viable builds really ties a cRPG together in my opinion, especially action RPGs like Diablo 2. PE obviously isn't an action RPG, but this is still a major factor of replayability, especially since combat is still fun like it is in action RPGs, but also, crucially, more meaningful in a more storydriven game such as this.
Relevance and variety
The team should make an effort to make every type of base armor relevant. It has often been the case in these games that players just immediately go for the heaviest type their class can wear and then that remains static for the rest of the game. It should be a tougher choice in my opinion. Perhaps my wizard is wearing medium armor as a compromise, but comes across a light armor with unique enchantments that grant a bonus to spell penetration, making my spells harder to resist for monsters with resilience against magic. Perhaps the game could have something like a forge where you can move enchantments from one item to another, for a (high) price? If not, I'll have to choose very carefully, and perhaps switch as necessary during my adventures. At the same time, it can create a feeling of dissatisfaction when you're stuck trying to choose between armors and you're not happy with either of them; if you're indecisive in general, like I am, that can be a real downer.
In response to this, all I can say is that a rare version of a light armor should DEFINITELY be on par with heavier armors. Maybe not something extreme like a super rare leather armor being as good as full plate, but still. It should be a fairly big deal imo.