I'm torn... On one hand, it would be wonderful to see bigger fireworks, but on the other, is it worth riling up the neighbors again? To give them a reason to dust off up their pitchforks again? And besides, there are bigger fish to fry. Such as how all rides except Big Thunder and Buzz are closed somewhere in the afternoon even on nights with fireworks.
I think they do a fine job with the low-level pyro, really. The Enchanted Fireworks has everyone flabbergasted not for of the size of its bangs, but for the pitch-perfect synchronization to the (wonderful, Menken) soundtrack. And that's something Parc Asterix will never beat them at, anyway.