Blue
Ravenous Bugblatter Beast of Traal
Still, citation needed. Throwing more adjectives at it does not constitute a shred of evidence.There are lots of ideas left. How many do fans actually want that can be implemented with WOTCs light touch, refusal to make major overhauls, and the rigid system. There is only so much left they can squeeze into the current system to make a book worth buying without making big changes or going on the crazy end.
For example, "rigid system" - what do you mean by this, and how is 5e so totally unlike the other editions that ideas can't be applied?
Refusal to make major overhauls is called "an edition". Just because 4e experimented with rewriting subsystems (and had MAJOR player pushback on how they were using their errata) doesn't mean that "keeping an edition coherent" is a bad thing.