I am doing 2AH (maths, physics), 1 crash Higher and picked up another higher from my NAT5s.
My school allows us to drop one column if we do an AH, but we still need to do 4 subjects. If they had allowed 3AH only I would have jumped at it but I was worried 3AH and another higher would be too much.
AH are getting into even more depth and complexity, but if you grasp it ok they are not that much extra workload, although having the reduced course by not having the projects to do this year might make them feel like less work. They should also now be subjects you are good at and enjoy which I think always makes things easier.