First of all, I'm very glad that Starsector is going on, no matter what. Truly wonderful thing.
Secondly, The Thumper Rework. I mean after all this years it got its well deserved attention.
Although reduced OP cost is obviously the step in the right direction. There are other problem with it. Thumper is a burst based weapon and as such has very high "per click" flux cost - 600. What is quite noticeable for a "medium slot filler" tier weapon. Changing it type to simple sustained auto with the same dps will make it much more suitable for its role. If, for some reason, another simple auto weapon is considered as too boring, ammo variant can be implemented (like in Autopulse Laser). Both methods will provide much better flux control without too much work to implement them.