I think this would hurt lucas more than help. If you use offense up you'll more than likely save the boosted smash for a kill move. If it affected his B moves then after offense up is charged you would be unable to use his side-B/recovery because it would waste the boost. side-B isn't exactly a kill move(iirc don't kill me if it is e.e) So if you wanted a killing smash you'd have to charge and not use your projectile which i could see as being kindof annoying and detrimental to his spacing.. since i'm a Link main and we have panic attacks if we go more than 3 seconds without throwing something at someone.. i can understand the potential annoyance of having to hold off on using your projectile.. unless your name is samus/lucario at least.Make offense up affect Lucas's B moves as well.
I think I recall somebody telling me this is not possible, but it'd be interesting.
I probably phrased that badly.. sorry. You get the idea though.
Or on the other hand they could make it so a charged side-B has kill potential and it doesn't affect up-B then i guess it wouldn't be an issue.. but imo it's fine how it is.
inb4thejokewentoveryourhead