I'm surprised there aren't more WW players talking about this. Perhaps they are all out there happily taking advantage of the unintended glitch created by the patch?
It used to be rare for an MKII to 1-shot-kill an enemy MKII while it is being lifted by a carryall. Even skillfull players couldn't pull it off consistently therefore we put it down to bad luck when it happened. Now, players seem to be able to pull it off almost every time and the game was never intended to make it that easy.
So yes Sol, I can 100% confirm something has changed with the mammoth mkII behaviour, and with it being such an important unit on TS, it has ruined the game for a lot of players except for those who know how to abuse it.