I think if mitsu pulled together their interior and made it more pleasing their cars would sell better as well. I find it ironic that the lancer and evo have identical interiors. Granted your buying the evo for performance, but it shouldnt share the same interior.
I think mitsu needs to take a look back to the 90's and revive some of their cars. The galant from te 90's-early 2000's look good. I think they should also offer the eclipse in a fwd and awd turbo option (gst,gsx), and give it 250hp. You could also entertain the idea of a 3000gt (with vr4 option). Make the 3000gt compete with a 370z and you could probably move a decent amount of car.
People like seeing new models and complete make overs of existing cars. Mitsu basically needs a good overhaul of its model line ups.