elves and dwarves, hard no for the same reasons Croms_Faithful said.
proper religious sacrifices would be great.
new map – i think this is better left to modders, a new map is a huuuuuge undertaking, investment of time and money, time and money better spent on bug fixing in my opinion. getting mods to console should be priority, tho i dont expect it to come any time soon/ever. a new official map would be welcome, but i dont think funcom has the resources to make it happen.
Better thrall AI and NPC AI is a dream. A dream i share.
Tweed’s suggestions on more factions and settlements, I think would be great, as is the suggestions/ideas to make pets actually useful.

realistically, it looks like the next age is gonna focus on their Smart Objects backport. so expect new benches and ways for thralls to be placed on them, so they can stand around and do stuff. Dennis also suggested he wants to make all thralls be placeable people, and not just items that go in benches. my thought is this is gonna be the focus of the next age, hopefully thrall AI, and AI in general, is gonna be a part of that rework. as to what the Age of X will ultimately be, I hope for an Age of Savagery as suggested by LostBrythunian in a different recent post, Age of Gods / Age of Sacrifice would be cool. how they theme the Smart Objects and thrall placement stuff is outside of my prediction abilty, but i have a strong suspicion that these mechanics will be a core part of what the next age is centered around.