...
I can get 40 kills with Sherman but I need around 15-25mins to do that. Sometimes even more. Luchs can do that in 5-10mins.
So first it was 30-40 in 6 minutes, then 20-40 in 10, now it's 40 in 5-10.
Make up your mind
I just had a Luchs, and sadly MM gave me a newbie bash. And in rougly 5,5 minutes of base sieging it obtained 29 kills. I've had more before, it's possible, but that's the deal of a light AI vehicle - it can also backfire quickly if the enemy counters it properly.
As Heartless already mentioned the T70 can be also a serious threat, and let's not forget about Recon mode. And by the time the Luchs hits the field, you already will have gathered approx 200 fuel. Even if you exclude some upgrade fuel, it's pretty easy to yield a medium tank at the same time, which will wreck the cute little AI cat rather quickly.
Would be nice to have some super slight HP buff for the T70, so it doesn't die to two PAK40 shots, but that's it pretty much (in my opinion).
Edit & P.S.: if a Luchs wipes your Captain or Zook squad before they can shoot, then you're doing something wrong.