This is the only Disney park I've been to (out of 9) that I don't like. It should be improved to compete with the incoming Paramount parks. I'm glad it's getting a Ratatouille attraction and restaurant, and I'd welcome an original Star Wars land and attraction, but if I owned Disneyland Paris the studios would get these attractions:
A "Raiders of the Lost Ark" themed indoor Jungle Cruise style ride set in a jungle at night where much of the ride would be in cave that would feature a mild white water section and/or two or three Anaheim Pirates drops--but a little longer since the boats would be bigger. OR, Iger, buy the rights to make a Willy Wonka boat ride.
A different Cars attraction than the one in Anaheim, perhaps with a race through city streets or a jungle with one elevated bank with views of the resort.
Soarin' Over Europe or France in 3D. 3D glasses could look like old aviator goggles. (Not my idea.) This could be wedged into the Studios theme because it's cinematic. And add a 360 Circlevision tour of France or Europe.
And knock down the ugly & depressing Hotel Santa Fe and make it a different part of the excellent Hotel Cheyenne--perhaps more like Virginia City with some three-story Victorian Western buildings. Make it easier for Americans to make reservations via phone and the internet.
Let Adventures by Disney have multiple day and overnight trips from this resort so that it could be a better hub for vacations to Paris.
What would you add if you had a billion to play with?