Shifter Underpowered?

[Shard O'Glase]

they hydra's ability to regrow heads isn't listed as Ex so I don't think that would be something that the shifter would have access to.

It isn't listed as anything in my book. But considering how all the split abilities, regeneration and other insane physical abilites seem to be EX I expect if they caught their oversight they made it EX.