If you have a cap that is in Epic territory, then for non-Epic play it, in effect, doesn't have a cap (barring Initiator level boosters, which I can't remember if I have ever seen). The reasons those caps exist is to make things viable at levels past the cap. Adding that option hurts nothing.

Also, for Core spells that cap out in Epic:
http://www.d20srd.org/srd/spells/healMass.htm <- caps out at caster level 25.