BLM Pre-60 Ease of Use Buff - Fire1 cast time reduction

[Shurrikhan]

Just let Firestarter stack to two. There's almost no balance implications of this at max level.

I don't like killing Firestarter-replacement risk, but if we're going to do it anyways... is it so harmful to allow 80% of an oGCD weave on your Fire cast itself via the OP's suggested cast time reduction?