As a wise man once said, "How can we know Arceus-Bug is broken if we haven’t tried it in OU yet"
Like, Pheromosa and Genesect are way more pressing matters, honestly. Also FUCKING EXTREME SPEED MEGA PINSIR WHO DESIGNED THIS SHIT (while it was my fault to not have Power Gem on Flutter Mane tbh, that also may cause Pinsir to not come out until later because the AI reads your sets, so...)
Magnezone and Seviian Clawitzer are non-issues, honestly.