Thanks for expanding on the legacy system, I've never played the game but was just vaguely aware of it from a friend. It sounds kind of cute to me (better than I thought even), and I really don't mind seeing alts getting neat little tie ins like that but if there are a bunch of rewards in these systems then I would hope that non-alt players could partake in a way. For example if we could create delivery NPCs or something in place of an alt character, "alt light" character, so I don't need to do the MSQ again if I don't want to (but someone who wants to really customize their character story could do so). If it's mostly RP / aesthetic or QoL between characters (like easier mailing) then that's fine though (I just mean content rewards unique to a system that works with alts, hopefully has some other method to interact with it too - like NPC/Trust).
Also way to make me sad about the housing system lol. Another game that lets you be where you want without worry about memory limitations, and is cross alt :3. ("sorry Shirogane Large, full no can do - can have a small goblet though or leave your server ;/").
The rift system sounds a bit like WoW's is that an accurate assessment? In WoW you get cross character glamour log that can hold nearly every item in the game, big difference between Rift and WoW might be though that WoW requires you to bind the item to you.. so.. can't resell it lol. I hope FFXIV can get to that tier of glamour log, that'll be really neat.