Well, I think Wayland is going to avoid the "second-system effect" as it was intentionally designed to be smaller and less grandiose than X. http://catb.org/jargon/html/S/second-system-effect.html

But the reality is those features were added to the first thing for reasons. Which means there's user pressure to add them again... which means the second system effect is virtually impossible to avoid.

See for yourself:

https://wayland.app/protocols/

And unlike the first system, it doesn't have the experience of use to refine it.