Name your top 3 things that turned you off and top 3 things you would like them to do? I'm genuinely curious.
I probably can name one that encompasses a LOT of stuff.
The big thing I do not like...
1. Added complexity - An example of this is making feats something that are mandatory at first level, or the default now. Simple is good. Simple helps people get into the game better. Making it more complex is not always better. It's a problem they learned from AD&D to 3e (20 million to 5 million players...granted...many had stopped playing already, but WotC failed to garner back those lost players) and from 3e to 4e (4e was a simpler system at it's core, but the powers made it a LOT more complex so went from 5 million to 2-3 million players).
5e went simpler again. Did away with mandatory feats (not that there weren't some designers that REALLY WANTED them in there). The more complex the bigger obstacle for new players. It can also be seen as unbalancing in regards to backwards compatibility.
And that's just talking about feats...
Things I like
2. That's been added to it thus far? I haven't actually seen anything that they've ADDED to the game that I would prefer over what was already there thus far. That's thus far....of course.
3. If we are talking about what I'd see added, I haven't really thought about that. It's supposed to be the same edition and backwards compatible. Why would I think about what I would like added?
Thinking on it NOW...perhaps an even easier start up version (aka...basic) with even easier character creation for those trying to pick it up for themselves via the free online basic rules. That probably could encompass far more than 3 things though if one thought about it more deeply.