I would like to see Inventor better able to to apply fillets to complex shapes. Improved variable radius fillet operation. I would also like to see an improved shell operation. The shell command struggles with complex geometries. Lastly, for now, improve the shell variable wall thickness operation. I've tried to shell complex objects only to find that Inventor just could not do it. Then I have to find an alternate way to model it, when shelling would make the modeling much easier.