As the title says,
1) Random encounters
2) Night and day cycle
3) Camping where you are, dungeon, woods etc.
4) No height advantage in combat
5) No enemy HP bloat
[...]
Let's re-iterate differently. I mentioned the ruleset, but maybe it's something else. What do you mean exactly by "feel like D&D"? What's your reference, another D&D game, a tabletop game you've played (and that will depend a lot on the DM's style...), the ruleset as described in the Player's Handbook?
Because this question is very subjective if you don't set the reference, and you'll get a different answer from everyone.
Feel like D&D - Ever changing world with random events, non-static NPC's that do normal stuff not stand about like lemons doing the same animation for eternity. Make the world "feel" alive and lived in. Move dead bodies or have wild animals eat them or something. The ability to talk to every object isn't realistic, who does that? "Realistic" combat that doesn't envolve throwing 600lb barrels of gunpowder 80 feet and a world that doesn't literally explode where ever you go. Hey look the enemy is coming, quick climb a tree, stack some boxes, stand on a single step we need to be at least 6 inches higher to win. That type of thing.
BG1&2 "felt" like D&D. ToEE "felt" like D&D. NWN "felt" like D&D. BG3 does not, not because of the divinity engine either. It doesn't "feel" like D&D because it isn't. BG was released 22 years ago, even though it is dated as f it still gives you the impression of a dynamic world in the D&D universe. After 22 years you expect to move forward not slap a lick of a paint on DDOS2 and call it BG3.
