The UI has most of all gotten more flexible. Previously you had highly efficient but also hard to learn workflows for everything, now you have a UI which also has non-efficient ways to do everything so you don't have to be good at everything to get shit done, can build your own mix of "yeah I'm doing this every other second, I want this to be fast, I use that twice a day, I can click through menus for that". Blender has way more functionality than will ever fit onto keybindings so customising the UI to your workflow is a must if you want to be efficient.

Generally the whole thing has been a giant success, however, I do have a criticism: They made left-click select the default. Right-click select has always been superior but it was not what the Maya etc. folks are used to. Have it available, even as a choice on the first startup screen for those people, sure, but don't make it the default for people just getting into 3d editing.

And, yes, Blender still breaks plenty of UI conventions in plenty of other areas. Saying "For good reason" would be kinda missing the point, very often it had those conventions before Microsoft or whoever came up with worse ones and made those popular.