i don't eat, i don't sleep
Most if not all of CAP30b's weaknesses are popular types found on many coverage moves, particularly Ice and Electric. On paper, this seems to be very good, being able to take less damage from most coverage moves and fulfill its potential role as a defensive Pokemon more easily and effectively. The issue I can see arise in practice, however, is that such coverage moves are so common that CAP30b is going to have to keep taking them over and over again, and that damage is going to stack up easily. It's not like it'll take damage from super effective hits as if they were neutral hits; they're still going to do more damage than as if the move was a neutral hit in the first place. Sure, CAP30b may be able to stay in on an extra Ice- or Electric-type move with Filter, but it's still going to be forced out either way and will still be taking a good chunk of damage. It's not like we magically become switch-ins, either. In general, the popularity of the types CAP30b's is weak to would most likely make Filter not as useful as it seems at a first glance.How does our typing complement Filter? When do we benefit most from the ability, and when is it least impactful?