Side teching that gives it sight after it hits an enemy, and blitz (and slight up satchels but we don't talk about those). What they mean, I think, is that it should be an overgrown cromwell in the way that the t34-85 is an overgrown 76mm and to a lesser level the way the tiger is a much bigger p4. I don't think that the comet should be a brit panther, but a slightly heavier cromwell might be good
Let's be honest here considering the only other faction that lacks late game rocket arty (USF) get vehicle crews these "perks" are pretty poor in comparison.
I think a nerfed armour comet redesigned with better AI like the 85 could work, but it would need to be cheap. Otherwise people would just continue to ignore the tier when anvil exists and gives you a beefy AI tank with OKW repair speeds.
I'm in favour of some form of hammer rebalancing personally (as well as comet vet buff) because right now no one picks it over anvil. If it was worth the tech for the abilities you would see people upgrading after building medium tanks... But noone does that, top players just go for anvil and much needed repair.
Nerfed comet into 85 role and land mattress in hammer could work well too I think, definitely an idea for a balance mod. Cutting out all these weird, leftover nerfed abilities (glitchy WP shell, tank nades) and giving UKF actual tools like rocket arty and tanks that scale with veterency. If of course you pay the premium and lock yourself out of repair and a heavy...