Oh yeah a solid change that kicked the commander practically out of the game along with the removal of the Dozer blades. Very solid. There would have been other ways to make up for RoF nerf (for example an AOE buff) that wouldn't have an effect at vehicle/tank combat and kept 76mm somehow attractive.
I remember the long discussion we had as the nerf was tested. You were always claiming how op it is and that the nerf is needed while I was arguing the other way and pleaded for some kind of compensation at least (->AOE). After witnessing the burial of this commander in succesion of june patch I guess I was right.
The problem in your logic is that you consider that since the commander is not picked thus 76mm must be up, which is a big logic leap.
76mm Sherman had a ROF 4.55 which is faster than all allied mediums that have a ROF above 6.
Compared to 75mm it was firing 1.5 sec faster while having superior penetration and comparable AI. On top of that it is even getting better reload bonus of 30% instead of 20. The damage output of the unit was simply OP.
If the unit requires change they should be focused more on price or defensive properties and not on damage output.
Can the commander be improved? Sure but imo that does not mean that units it provides should become OP.
I personally would test bringing the commander back to original design as commander that can invest heavy on light vehicle play.
Changes could include:
1) WC51 now designed as a counter to Kubel (something USF can use) and snipers.
Now comes with gun but can not transport (or transported unit can not fire). Possibly allow passenger firing with a MU upgrade. (change could allow lowering Cav riflemen CP to 0)
Off map removed mark target replaced by "wark sniper" an ability that makes sniper unable to cloak.
2) "withdraw and refit". Ability now allows USF to withdraw light vehicles and replace them better ones for a cost:
AT CP 2 WC51 can be withdraw for M3
AT CP 4 M20 can be withdraw for greayhound
AT CP 7 Stuart can withdraw for M10
AT CP 3 AAHT can withdraw for QUAD
3) Cav riflemen
4) 76mm Sherman
5) 155mm of map
In sort the commander would be focused on heavy light vehicle play in small modes while having a strong off map for large modes.