Note, I actually wasn't criticizing beam fighters as overly powerful. To Jorgen's point, I think they're well balanced right now, particularly for multi-faction (although I rarely play multifaction).
Right now missiles and larger ships benefit from decoys, but fighters do not (minimum decoy launcher size is 5HS or 25 tons, which is almost small enough to be useful, but not really, and a single size 5 decoy missile won't help much for a fighter of ~250tons or more). What if decoy missile effectiveness wasn't linear, but instead scaled significantly and inversely with size, AND make it applicable to incoming beam fire in addtion to missile fire? That would make them much more effective for fighters and much less effective for very large ships. That makes sense logically (are you really going to convince a missile that a 2nd giant 100kton dreadnaught magically appeared over to the left of your original target?) and would give fighters some protection from beam PD-type weapons similar to missile's ability to use decoys. Then to offset that and keep the current balance, allow BFCs to target multiple targets, you just don't get to control which weapon fires at which target. That's acceptable for PD and anti-fighter weapons, but you'd want to be more specific with large weapons, so you'd only assign one target to those types of BFCs.
Thoughts?