This might just be me being slow, but I just noticed that the Blaster customs not only change Falco and Fox's U-, B-, D-throw's aesthetically - the lasers changes -, but they also change their damage output and knockback. Falco's U-throw usually kills at like 189%?, but with Explosive Blaster, it might not kill since the knockback looks weaker despite doing more damage. Burst Blaster's out of the question. Considering Fox's Charge Blaster...
I just checked and U-throw and Explosive Blaster output 10% total while Burst Blaster does 7% total; default does 8%. So, the throw stays as a constant of 4%, but Explosive Blaster does 6%, Burst does 3%, and default does 4%. This really needs to be checked for Fox since it could definitely change his game with Impact and Charge Blaster doing more damage and having knockback.
So, with this, Explosive Blaster makes Falco's grab game even more dangerous since it does more damage now, but the trade off is the ability to kill for some reason at certain percents with default Blaster. Burst Blaster might make it easier for Falco to combo at higher percents because of the lower knockback and this might the same with Explosive Blaster.