X5, Frigate Orpheon switches whenever it feels like it AFAIK, it has no set pattern.
Frigate Orpheon will go neutral at worst, it really screws your opponent much more than it would for Sonic, simply put. As long as you make yourself comfortable on Frigate, you can't go wrong. Granted, there are better specific maps to take certain opponents, but if you're not sure this place out to be just as reliable as any other CP stage you're uncertain of. Just make sure you don't get infinited on the wall when the platform in leveled low that is a humiliating thing, even if it's only for a couple of seconds to fall into.
I would probably rate this map 3.5 just because of Sonic's versatility.
BONUS: Japes - It sucks, ban it if you canl.