I never just take one character from one campaign to another and I really don't think this is a MUST HAVE, much less a standard.
Seems to me you complain about a easy of use functionality, you can do without it with no problem. They might add it later if they can and if everyone yells about. To me that is a "nice to have" improvement.
Fair enough that you do not, doesn't mean others don't.
Having to start a fresh level 1 character with every single game, module, campaign and GM game seems completely bonkers to me - you will never get to RP or develop a character. You will always be pushed back to square one, there will be no continuity and it's a hassle that we can do without.
What amazes me the most though, is all the talk in their trailers of PnP etc... if they want players to have a true PnP experience this feature is simply a must.
I have DM'd games before and been part of games DM'd by others - both on PnP and games like Neverwinter Nights and Sword Coast Legends. We developed characters over modules with ALL of those.
Anyway, I feel I have said my part on the matter (and I think at this point I am just waffling ;-)) and I know I am not alone. I can only hope the developers listen because they seem to underestimate how big a deal this is to certain players.