Yes it's an extra to burn enemies of course, what i meant when i said it's pointless is that, for example, i am using my mage as a double haste machine, and then after that i can either pass my turn or just use him to finish some low hp enemy, but by using haste and avoiding losing my concentration on my mage i feel i am more useful and that i am wasting less resources than by trying to do combos or to deal a lot of damage, after all my two hasted guys are going to destroy the fight in a couple turns, and even if they are melee their movement is so high that they can go anywhere to be honest.
I feel Divinity 2 made me try harder to use elemental status since the damage output overall was way lower unless you used "Glass Cannon", but that forced you to be really really squishy, while on BG3 you can be tank as hell and still land a lot of attacks per turn.
About the arrows yes i mean the ones on your inventory, basically every usable item on there, same for scrolls, or grenades etc, on BG3 there's way more than you'll ever need, i have hundreds of these items at this point, Divinity 2 felt way more hand-crafted on that, that's why i meant stealing was more useful in D2, as you were resource limited, each arrow, barrel, or gold you could get was great.
On BG3 i got over 20k coins right now, which i left on my camp because it's already over 20KG, most items cost 100-400, i could buy every item from every trader and i wouldn't waste all my coins at this point, as for camp resources, when i saw you needed these to camp i liked the idea of having to plan when to rest etc, now i have around 3k resources also on my camp since it's around 150-200kg. that's like 35 long rests.
That's why i said stealing doesn't make much sense in this game, other than for quest items, i created a character to steal because it was very important on Divinity 2, but on this game i just stole something two times, i don't see any point on stealing more gold, arrows, scrolls etc when i have so many already.
As for my favourite games i'd say both Divinity games combat wise were great, even tho both have flaws, also both XCOM, i've spent over a thousand hours on these games and i still don't get tired of playing them just for the combat. There are more but these are the ones that will always come to my mind first.
And about the combat i agree with you, it's not that long at least on BG3, while some specific fights can last 20mins, i'd say the average might be 5 to 10 mins range, would help if we could "skip" enemies turn's animations for example.