1.) Pay attention to the 5e rules (bugs are : e.g. casting a second spell per turn (with e.g. haste) / sneak attack 2times per round with haste / Mage can learn all existing spells / everybody can read all scrolls / while dual wielding you can use your bonus attack before you perform your weapon attack / ...)
2.) No more throwing healing potions to somebody 10 meters away and he/she insta-sniff it with the mucous membrane and is instantly healed
3.) Long rest/short rest management. To implement camping supplies was a very good idea, but we have to much supplies in the world. At the moment you can nearly make a long rest after every fight (to the delight of all magicians)
4.) XP --- the leveling is too fast. Level 2 after the nautiloid, Level 3 when entering the druids grove and finally level 4 near the goblin camp or even before. I don`t want to be at Level 10/max and only half of the game is played. Gaining XP must be harder and/or the XP for each levels must increase
5.) I don`t like the idea to send your heavy loot to your camp. If you want to sell it, you have to carry it, or leave it.
6.) Travelling with the waypoints should only be possible at one of this waypoints and not from everywhere
7.) Saving the game during combat? Not very challenging in my eyes. Maybe optional in an easy mode or so.