And despite all the time since then it's still an awful idea as it brings nothing at all to the faction except a slightly different cromwell. It doesn't allow alternative teching, it doesn't give more anything except overlap.
Then the logical alternative would be to allow the dozer upgrade for the M4A3 or add the 76mm Sherman instead. That being said I don't see how the M4A3 is the samething as the Cromwell. The M4A3 has the AP/HE shells, a .50 cal, seems like a much better tank.