If the intended change to the catalyzer line is going to happen, may I please beg that you make new 5* variants with the new mechanic.
There's no point changing a gun that wasnt broken to start with, and I'm sure it's not too much hassle (other than perhaps thinking of new names) to create new guns with the new mechanic and keep the old ones as they are. Keep everyone happy.
Faithfully.
The first round of catalyzers changes resulted in universally detonating bomblets, with dual-detonation when cata charge was used.
The second round had a single damage tick to allow for breaking blocks. If that single damage tick was changed to the current catalyzer bullet damage, the new changes would take effect AND the gun would function in LD as it currently does.