while I don't hate the removal of crush, I have a less drastic alternative solution.
Right now, the most effective crusher in the game are the cromwell, t34/76, and the m10 wolverine. While most people seems to think it's their top speed and acceleration that make them effective crusher, in truth it's actually their chassis rotational rate.
95% of crushes are actually the vehicle rotating into the infantry at close range, or the vehicle turning on a dime into the infantry. the cromwell and the m10 both have a rotational rate of 38 deg/s, while the t34/76 have a rotational rate of 36 deg/s. By comparison, the sherman, panzer4, and the panther only have a rotational rate of 34 deg/s, 32 deg/s, and 30 deg/s.
Then, to nerf the cromwell/t34/m10's ability to crush infantry without removing the mechanic entirely, the best way is to nerf their chassis rotational rate. From personal testing, giving them a rotational rate of 32deg/s seems to removing most cases of infantry crushes. 34 deg/s is another possible value, but there will still be some crushes left.
addendum: forgot to list valentine as one of the good crusher. its got the same movement stats as the cromwell.
