Honestly, I don't think anyone was yearning for the combat of KotOR. KotOR combat was utterly forgettable, largely uninteractive, and pretty much seemed to play itself. Character builds seemed like pretty much anything works without particularly trying and, being d20-based, the level-ups often didn't feel impactful either, especially if you were playing a Scoundrel. Once your character became a jedi it got a bit better but even there there is very little build-up from weak powers to stronger ones. You can pretty much cherry pick all the coolest powers you want and obtain them, so you really don't need to bother with build paths. So it's pretty hard to give a fuck about KotOR's combat. The only requirement to do better than KotOR here is that the combat actually feel like combat and not like time-wasting.
The bigger source of complaints would be if their new action-based combat results in the lack of party members. The other source of major complaints will of course be the revamping and butchering of KotOR's characters and story, as well as derailing the story to satisfy the need for players to experience the "cool stuff" the remaster team threw in. The story and characters still have to feel like KotOR, and narrative pacing matters. This is probably the spot where it can get absolutely clobbered in the customer reviews and even a number of the professional ones.
But there's still the expectation that it would play similarly, not necessarily identical.
e.g., a lot of gameplay elements in Dragon Age Origins are similar to Neverwinter Nights and Baldur's Gate. I have issues with DAO's simplification of some things, but I generally found it to have some of the most enjoyable combat in any RTwP game I've played, eschewing the unnecessary hidden rounds for true real time was a great improvement over its predecessors in my opinion.
If a kotor remake had combat like Dragon Age Origins, I think very few fans of the originals would be upset. It wouldn't be a subgenre-departing change from the originals, and have a very similar playstyle, party control, so forth.
However, if a kotor remake decided to be more like Witcher 3 or other action RPGs then there cause to complain. There would be no character of the original game in this, it wouldn't be a remake.