General concerns, some of which need to be addressed:

[frostmagemari]

I disagree with every point you made.
Except maybe dungeons needing to be more rewarding.

The problem is... if they make everything so easily accessible to you, you'd max all classes at 50 in no time.
MMOs are supposed to be played for years. There is grinding involved intentionally.

Get your first class to 50 any way you want. Then when you go to level your second class, take your time and just enjoy a slow casual build up with it.

MMO's are supposed to be played for years because of interesting and enjoyable content. They are not supposed to be played for years because leveling your 2+ class takes a month of grinding leves or fates.