I do see those however that doesn’t necessarily hit the root issue. Users should be able to edit their posts however a new moderation item such as: post edited should require mod approval.
Warning, I built a system similar to this at Stack Overflow and it took multiple months to get all the polish right. It was pretty large scale and involved anonymous edits as well, so it may be a bit bigger than what a basic plugin needs.
We are not particularly keen about adding this to core for now, but it can be a plugin for sure and core should provide the extensibility require to implement it.