While there have been no statistical changes to the weapon the ice trails it leaves behind (just the default ones not the new overclock) seem to deal more cold damage than they used to as I’ve noticed them freezing enemies a lot more often.
Perhaps a tweak that was made while they were looking at it for the purpose of the new overclock?
I haven’t noticed any difference, but granted, I do use the cryo cannon less often.
That said, I did notice in the changelog a lot of damage type adjustments (though mostly for poison), so maybe there’s that too.