Originally Posted by
Niwashi
I agree with the OP. The numbers are fine when they're meaningful, i.e. when they actually indicate a higher power of the same type of spell. But the name itself should indicate when we're dealing with a completely different type of spell. Using suffixes for types and numbers for potency makes both type and potency more clear.
(As an added bonus, it would satisfy both people nostalgic for the traditional FF suffix naming and those who find numbers clearer than suffixes, since it uses both where each works best.)