This is amazing!! Something I've waited for a very long time. Will there be fixes to Aircrafts Data?
A350-900ULR should have much more range albeit with a load penalty
B777-300 Non ER shouldn't have 8000+ miles range

Additionally is there a way to change the Aircraft seating formula? Because planes like B787-10s have 440 seat limit but actually they are longer and can cater to more Premium Seating. Although this might just be a feature request type of thing.

Either way, Good luck to you and looking forward to all the new aircrafts and updates.
Begin as you mean to go on!