That are my suggestion after playing patch 5, but not restricted to it's new features.
(Most of them are mechanic suggestions)
1- Swapping between equipped weapons (Bow to Sword/Shield) should cost something (BA or RA), I mean the way it's currently, there is absolute no reason anyone shouldn't end the turn with the melle weapon, making possible for an AoO.
1.1- Shield giving +2AC even when you are currently holding a Bow seems unbalanced. Although it make sense when you think that you can swap to your weapon and shield for free even after attacking with the bow(I mean, it could be a way to don't pressure people to getting back to it's melle weapon everytime). But if that is the logic used, why you don't to AoO when are holding the bow, I mean, there is one contradiction on this.
2- Encumbrance -> I am a fã of the feature, with that been said, I know many people aren't. But what is the point of having it and been able to send itens to camp whenever you want?
- For people that like this kind of feature, it will feel pointless since it does't actually imply a real limitation.
- For people that dislike it will feel like a unnecessary micromanaging.
3- Remove the possibility of Wizards learning other classes spells, that is broken, not immersive, and frustrate for who like others spellcaster classes.
4- I personally don't like the mechanic of swapping prepared spells anytime, I mean, spellcasters are already strong, that make them even more versatile. I can understand why it was like that, since before you could just "long rest + change it" making it just a unnecessary micromanaging, but now that, in theory, you can't long rest all the time, adding the prepare spell only on long rest feature would make sense.
5- The most important to me: Make Hide an action for everyone but rogues.
Reason -> The way it is currently it's better for everyone fight without lights just (Hide+Attack), that will give Darkvision characters advantage and making the others neutral. And the ones more cunning can even (Attack+Hide) so you pass all enemies turn not possible to been seen.
Been honest, I would be "ok" with it if the enemies use this strategy too, as it was with backstab, but been a player's only seems unbalanced.
Thanks for taking you time to read, and for the replies showing you opinions!