Sturmtiger is overpeforming. Stats (Elite armor is most picked doc from 2vs2 to 4vs4 while okw does fairly well in these gamemodes) and the majority of the (competent) playerbase agrees. No need for another 3 pages of useless unit/faction comparing and strawman arguments.
What should be discussed is how to nerf this unit without making it complete obsolete again. I think both changes in the last patch are fine and made the STiger viable. A cost increase (10CP and more fuel) is mandatory imo. Im not sure whether the unit needs more cooldown or a penalty while reloading (stands still, increased dmg)
Def a price increase. 10 CP is fine
Removal of self-spotting. No range increase through vet (40 at all vets)
Fix the fast fire bug (cannon aiming while moving)
While reloading, the ST is immobile.
For it's AOE, HP, armour it's just a completely broken unit
I think that would fix the unit.
Price/CP goes without saying
Self spotting -- OKW has a lot of recon units and the non-recon units should not provide extra sight
Fast fire bug -- well it's a cheesy bug people exploit
Immobile ST -- Seen a lot of frontline reload just because it can. 220+ armour and [1280,1440] HP says "I don't care about your TDs because I have my dual raketen and unless you have 4 TDs (eg max pop), you're not killing my ST"