I changed Rotom-W to the ChestoRest set, mainly because random Scald burns were getting annoying. Also decided to use Iron Head > Thunderbolt on Genesect. It provides a way of revenge killing Gengar, Mamoswine, and Terrakion, and I never really used Thunderbolt.
I'm still testing some of the other changes. Starmie > Latias is most likely the change I will go with but it does make me more Sun weak.