Incoherent1

I've stayed in other SPGs in the area (all great experiences), but not this one, so I'll let others respond to your food and hotel questions.

For transfer, yes I'd just call a Grab or Uber. I tend to find Grab has better rates, but a driver told me Uber has a better queue system at KUL (this was 2 months ago and may have changed), so it's often cheaper to Grab but sometimes faster to Uber. I've landed later than you at KUL and didn't have a problem getting a car very quickly.

If you can't find food near the hotel, then the airport may be a good option. KLIA2, in my opinion, has better food options outside security than KLIA1, but the vast majority of legacy and long distance flights land at KLIA1. Hope this helps and enjoy Langkawi -- it's a beautiful place!