I have been on this site for five years. You wouldn't believe how different it looks since I joined! I am not bothered by these changes as much as I am by the lack of intellectual, thought-provoking posts.
I think they added a new editor with more features, but as a result it also became slightly less stable. For example, Chrome does not remember the contents if the page gets reloaded on mobile, that for example is an absolute nuisance.