D&D (2024) Change multiclassing prerequisites?

[TwoSix]

And the sooner that the "combat roles" 4E tried to impose on us is dead, the better! Let the fiction guide character development!

If you really want the fiction to guide character development, don't play games where class features are tied to a level progression.

 

[Vaalingrade]

And the sooner that the "combat roles" 4E tried to impose on us is dead, the better! Let the fiction guide character development!

Roles guided class design, not character development.

 

[UngeheuerLich]

kill the classes and let everyone take few features at every level.

No. Play a different game then. D&D is class based.