That doesn't make Omnimon any less OP. It just means the OP Club is always adding new members with each passing series.

Don't forget we're talking about a Digimon that is traditionally formed by fusing *two Megas together*, meaning its minimum power level is equal to *two* Megas as opposed to one. Fine, it's not spelled out that way, but mathematically that is the logical measurement of the thing's relative power level.