Imo the unit does not need to be so good at dealing with ATGs and thus requiring the expensive Panther to counter it.
Imo and since the MGs have been improved Comet should lose the WP and Grenade. This could be compensated by price decrease or something like a AP round similar to Pershing.
The utility could then be moved to Churchill that could get the WP round, have its smoke replaced with "commando" smoke providing cover status but not sight blocking and having its rear armor and AT capability reduced. Price could be adjusted.
That would create to paths. Comet for more AT oriented Churchill more AI/breakthrough/Infantry support oriented.
Churchill with WP would probably be extremely overpowered. Having such a great AT gun counter on a tank that Axis already struggles to fight would not be a good idea. On the other hand, comet kind of needs that utility to justify the fact that it has like half the HP of the churchill. Making hamer and anvil that
specialized would also lead to frustrating games where the opponent just hardcounters whatever tech you pick in the lategame since its not like brits have a very diverse and versatile unit roster to begin with.