1. I was hoping to see battlemaster be default fighter.
And make Bear totem barbarian the "simple" class. Hit stuff or "click" Rage and hit stuff better and harder.
2. Making short and long rest equally important to all classes or if that is not possible removing short rest completely.
I have played in campaign that you get maybe 1 short rest every other day and in others with 3-4 short rests per day.
It throws balance out of what completely.
Or better yet, make short rest 1 minute, with:
1 short rests at 1st level
2 short rests at 5th level
3 short rests at 11th level
4 short rests at 17th level
3. Decoupling feats and ASI's completely or if that is not possible make every feat half feat with floating +1 ASI.
4. More feat "slots", getting 1st level feat finally is a good step, but it need to be more. Maybe every 2 levels instead of every 4 levels.
5. Cap ability scores at 18 and no ASI's from leveling, higher point buy/standard array to compensate a little,
I.E: 18,16,14,14,12,10 if someone really want's to roll it could be: (4d3D1)×2 for 3 scores and (5d3D2)×2 for 3 scores.
Less nightmare to balance later.
6. Having all "new" class features come online at 11th level or sooner, later just more and/or stronger variant of the same.
7. Giving option for "armored" classes to trade their armor proficiencies at 1st level for more skills/tools/languages/cantrips.