If they do helicopters, and I think they will eventually, probably 1 or 2 years down the road, then we definitelly also need better mountains.
FS2020 does a lot of things very well. Terrain and especially mountains is unfortunatelly not one of them yet.
Most iconic mountains, basically the whole alps, do not even really exist. They are there, but often they look nothing like the real thing. Way too smooth, often wrong altitudes, etc.
Check out Disappointing terrain in the alps if you have not yet.
Once they fixed that, and they really have too, then helicopters will also be a lot of fun.