Hopefully the big words got your attention
I have recently acquired a catalyzer, they're fun to use, but the mechanics are a bit finicky
I'll address each problem I've noticed so far and add a suggested fix to said problem
Problem: if you run with the bullet and they stack on top of each other and the bullets hit a block, they act as one and all 3 disappear
Solution: increase the bullet speed, not to a regular handgun speed though, probably something like the magnus charge bullet speed
Problem: bullets fade in 20 seconds, so you need multiple rounds of tag volleys in order to kill larger enemies
Solution: increase the tag duration to 40 seconds, or a minute, this definitely isn't game breaking and it only serves to make a thicker tag halo around enemies and requires less detonation
Fangels solution that I also think would work: add 5 seconds to the duration, but make it so that when the bullets expire that have a weaker, no knock back explosion
Problem: the charge can only hit enemies one at a time, so if you shoot 2 tagged enemies, only one registers
Solution: make the charge an explosive bullet, when it hits an enemy it has a small AOE blast with no knock back, like the valiances charge (bullet speed may remain the same
Alternate solution: (I believe someone on the forums made a suggestion like this in the arsenal after the gunner update, feel free to claim credit, I will add you to the OP) make the charge a laser (no knock back, only damages once) not like a IMF laser, I mean like it shows a bright line for a very short duration of time
Problem: this gun is atrocious when attempting to use it in a party
Solution: (claimed by qwez, it was a joke but its actually a good idea) make the tags trigger from any weapons charge attack
At solution from holy nightmare: bullet speed increase, maybe slows down tagged enemies (blandaxt addition:) 5%msd for each tag
Problem: the gun breaks freeze
Solution: find a way to make it break blocks without doing damage
Alt solution: make it so that freeze is broken only by attacks that deal more than 1 damage, this weapon is currently the only type in game that only deals 1 so that shouldn't be too bad
That's all for now, I'll probably find more later
Problem: if you run with the bullet and they stack on top of each other and the bullets hit a block, they act as one and all 3 disappear
This is more of a problem with adapting to a new playstyle. People hated Tortoguns because you couldn't get lots of damage on the regular shot or by spamming the charge. Only truly innovative people adjusted their playstyle to capitalize on the tortofist's power by using gear to move enemies into the incoming charge.
Problem: bullets fade in 20 seconds, so you need multiple rounds of tag volleys in order to kill larger enemies
I have found that getting the most out of catalyzers actually requires a middle ground between stacking bullets and spamming charges. I posted my Playstyle in your thread about Catalyzer UVs but to keep people on this page I'll type it again:
Just fire two of the clip and charge on the third.
Click, Click, Click and hold.
This way you take advantage of the catalyzer's special effect and still deal good damage to a group of enemies. If you time it right you can use the orbiting shots to knock enemies back.
Problem: the charge can only hit enemies one at a time, so if you shoot 2 tagged enemies, only one registers
Actually you can due to the fact that the Charge will set off orbs within a small radius of the charge bullet, it just becomes hard to do because of the slow speed at which the charge travels. It is also more difficult with AT on.
Problem: this gun is atrocious when attempting to use it in a party
Unless you can get the whole party to use these guns
Problem: the gun breaks freeze
You shouldn't have to rely on freeze to get this setup and besides, many of the more skilled players don't like freeze since it hinders kiting and can cut off routes in battle.