I don't care if it was totally worthless in previous patch, it is NOT the reason buffing it into current insane level.
The Kat in early stage of vCOH2, was perfectly fine.
Response to me? If so...
I never remember the katyusha feeling worth it, though I only played in the stress tests and not general beta.
Might be OP now, I cannot day and will defer. I definitely see how getting a ton of them out fast with Industry Tactics could be uber nasty. I've only used it once since the patch (just got a new PC) and for the first time, it felt worthwhile.
I think an AoE (splash) and\or damage reduction are probably warranted. I just hope they don't over Nerf it again and send it back to the dustbin of history.