As an aside, if you've never played Table Top, how do you know if this game, or any other cRPG DnD game, is even close to the rules, because someone said so? I mean, one of the common arguments when I was last active here was "but exploding barrels", as if Larian invented them in DoS. It's not like there's been a Grease spell in DnD for a very long time or anything... Wait, there has been. It's been flammable too. It's not like it doesn't have practical advantages in Table Top as well, where I have actually played, and actually used it tactically. I once linked to a video of Outside Xtra and Outside Xbox playing 5e, where they had a really fun scenario play out with Grease, and Spike Trap.
Wow. Do...do you know the landmine you just walked into? Whether grease is flammable or not is an
incredibly divisive topic in the 5e community. RAW, it is not specifically said to be flammable.
https://twitter.com/jeremyecrawford/status/739200837809934340?lang=enMaybe they don't have to be, but I wonder:
How clunky would KotoR had been if it had played exactly like BG? FO 1 and 2 did, but Bethesda went a different direction with F0 3 and 4, and Obsidian as well with FO NV.
I can't imagine trying to play Oblivion, or Skyrim in the same manner as BG, since the environments were as much a part of the game as the characters in them.
KotoR is an entirely different game series than BG, so it makes sense that they don't play exactly the same. It's similarly not really relevant to compare Skyrim to BG. Your Fallout comparison is more apt, but to be fair, there
was a huge outcry when FO3 was revealed to be significantly different than FO 1&2. A lot of fans didn't like the way Bethesda was taking the series. Allegedly, BG3 (because of the "3") is a direct sequel to the BG1&2 games, which means that naturally it is going to be compared against them. Had Larian titled the game "Baldur's Gate: Rise of the Absolute" then there would be much less unhappiness at its differences from BG1&2.
