I agree with pretty much everything on this list, save for maybe the gear perks, I do want more variety of stats available and I could see room for set bonuses. I could see some gear that shows up in the X.5 patch and grows with you into X.0 similar to how relics work. On MSQ, there's already this thread that includes some really good ideas and your open world dungeon type thing reminds me a lot of areas in SWTOR but better. I think they should be 'unofficial' dungeons in that you would be able to change jobs while inside so they can add things for crafters and gatherers to do to speed them up.

I mentioned somewhere else it would be really cool if some dungeons had lore appropriate sections to them, like Holminster or Vanaspati could have escort/protection of civilians I'm sure there is somewhere it makes sense to have a pause to heal people somewhere, Stone Vigil maybe - Run across some soldiers who just finished a fight but can't make it out without healing, make it a bonus objective that gives something nice if you do it. Flavour things like that that make dungeons feel more like actual places and events within the world.