It pretty much all applies to BG3: It's mixed unit enemy groups in fairly wide spaces with multiple lanes. Enemies some times bunch nicely for the 30ft template, often they don't holding at range. It's easy to think of encounters in EA that fit both categories. About the only things don't apply is denying short rests between encounters and legendary resistance, yet.
No it doesn't at least not in my BG 3 at all.
You can setup prfect ambush - surprise rounds every single time in all encounters... That wont change at all due to systemic way of Larian gameplay.
Having pull bombs that bunch up everyhing and shove as a bonus action together with other push abilties means you can bunch everything up into nice groups for AoE attacks if they don't die from a fall let say(if they are on high ground.) You can bait AI into whatever you want, they are like puppets you can control with all sorts of gimmicks like sleep spell and others.
All rest between encounters does nothing at all and at this point could just be removed... There is zero meaningful difference between short rest or long rest. Not to mention every class can casts spells due to scrolls that are unlimited and free. Vendors refresh those items lists whenever players needs them to refresh.
IF Dms you know play Dnd like this well more power to you... we sure don't.