The Comet definitely needs changes but a lot of the proposed changes miss the point (Panther comparisons), don't know the stats (Tiger comparisons), or are bandaids.
The issue with the Comet is that its power is almost entirely front-loaded and vet 1 is the only real power increase it gets. This is due to its extremely good scatter values allowing it to snipe infantry and its higher than necessary armour value making intended counters under-perform. In addition, its smoke shells allow it to counter AT guns from outside their range and its high maneuverability makes it extremely good at crushing infantry that get close.
I suggest the following changes:
- Distance_scatter_max increased from 4.2 to 6.2 (making it less accurate against infantry)
- Rotation rate reduced from 36 to 32 (reduces crushing ability)
- Smoke/W.P. Shell range reduced from 80 to 50
- Regains current scatter values at vet 2
- Gains a 20% reload time reduction at vet 3
- Armour reduced from 290 to 240
The veterancy changes mean that preserving your Comets is now actually rewarded while vet 0 Comets have AI abilities on par with the Cromwell to disincentivise Comet spam. The armour change will mean that Panthers have less trouble countering Comets and actually makes Hammer/Anvil a choice between heavy and medium tanks.
Other changes (in both directions) need to be made to make UKF a slightly better balanced faction but these would make Comets better balanced.