Listen, there is nothing uglier than Jean's 90s costume. Marvel Girl is infinitely better.
I thought Roberto defecting made sense given his mom just turned him over to the Gestapo but then they don't really follow up on the drama of it at all. Everyone else is fighting for their lives or the world and he and Jubilee basically have a slapfight with superpowers. Where is the drama of two people in love being on opposite side of a war? Instead, it's more like "noooo,stop it!!"
Cyclops kinda just doomed the world for no explainable reason. Why did Jean's team have to succeed first? I don't recall this being explained anywhere. Regardless, he was clearly doing it all because he was emotionally compromised by Jean's plight.