Regarding using L1 system in bands, maybe it's a bad idea to mix L1s and conventional speakers anyway. The reason for L1's near equal spread of sound is that the density of sound energy that emanate from a (near) linear source (L1) decays slower than that coming from a (near) point source (conventional speaker). If its a surface (wall of sound) it would be even slower.

So if you have your guitar on L1 and drums on conventional speakers and balance the two to sound right closer to the set up, the guitar will be more prominent at far (because guitar from L1 is nearly equally spread and drums from conventional speakers die down faster). If you balanced so it would sound right at far, the drums could be more prominent at close distance.

Shiral