I vote Lati@s. Thats a case where the original completely outshines the fuck out of the mega evolution. They could have just used regular Lati@s for soaring. That would have freed up two mega slots for other regular Pokemon.

Mega Sharpedo seems completely rushed. They needed him in ORAS for Archie with no exceptions. Sharpedo ended up with mere stripes painted all over it. No innovative concept or change in design. Just fucking stripes.