Good additions that you like. But there are things in 5E that you probably like that didn't come from 4E. And there are probably things you didn't like in 4E that are representative in 5E. There's no rhyme nor reason to what things that were adapted in some form from 4E to 5E that some of (general) you are happy about, and some of (general) you are upset about.I would not call 4E good edition of d&d, but that it added good additions to D&D as a whole.
and 5E designers feared everything from 4E that they threw away the baby with the bathwater.
So WotC cannot take any of (general) your singular opinions on the matter as gospel. Because everything you, Horwath, think were good adaptations of 4E material into 5E are loathed by a goodly number of other players out there. So whose opinion on the matter is right? Which means all WotC can do is get a general sense of what many players seem to be okay with... and then write a game they themselves are for the most part happy with. And it'll include some things each individual player likes... and something they don't.
But even then... none of those designers will be completely happy with what they finally decide upon either. Because their individual needs aren't always going to be served based on having to compromise as well (for all the reasons a group of people who work for a company have to do). And this we all well know, because of @mearls comments himself about Bonus actions that triggered this whole conversation in the first place!

