This gets mentioned like every time anyone posts about either of these weapons and them being fail binned and crap on'd but the reason why is because they overwrite the damages of two default weapons: the mininuke overwrites the rocket launchers damage, and the ion cannon overwrites the default guns damage. It is nothing to do with how powerful they are, how much they lag your computer, or how people can abuse them on freebuilds or something. These are problems with them, but that is to be considered by the host.
If you would like a version of the mininuke that doesn't overwrite the rocket launchers damage, it is available
here.Edit: this is a lot of words to basically say this topic is kind of pointless and there's nothing noteworthy about having access to broken addons, but whatever