i think alchemer line will be more interesting if they have different style of charge shot.
for example ,STORM DRIVER's charge will shoot 1 chain lightning that will jump to different targets , HAIL DRIVER's charge will not explode to small bullets but small radius of freezing mist ( or can be radius of ice spikes deal damage over time if enemies stay in that area ) , MAGMA DRIVER's charge is like 1 big fire ball that explode in contact and deal AOE damage + inflict fire , NOVA DRIVER's charge will explode to many small bullets ( like crystal bomb style ) and these bullets will not ricochet ... is it sound interesting enough?
From one thing to annother. Not a big deal.