I’d argue that anti-claim being added due to mass claim being boring is a better reason than adding anti-claim because mass claim is OP.
OP things can be solved by either:
A - Removal (Which an anti-claim accomplishes)
B - Weakening (Reducing confirmation accomplishes this)
or
C - Counterbalancing (not currently being used explicitly. But basically just give scum enough power to handle massclaim at full force)
However if the problem is that Massclaim is just boring then simply making it a bit weaker or making the other side strong enough that it’s current power is ok won’t usually solve the issue, that leaves removal.
Thus non-balance reasons are a more compelling reason to add anti-massclaim.