The Rooikat MTTD was perfectly fine at 9.0 before and did not need a stronger shell - DM23 was just fine punching through your most common opponents (T72 and T64) through the driver’s port and LFP.
(Not to mention, using your mobility to get sideshots, lol.)
This change was completely unneeded and only served to ruin the Chieftain Mk10 which is a great vehicle now having to be moved up to 9.3 to play with a full lineup or use 8.7 vehicles as backups. This change also STILL makes the Rooikat 105 kind of pointless - if only one of them got DM33, and the other at a lower BR it would make their differences actually discernible.
I’m not sure if the MTTD even used DM33 or even DM63 IRL - documentation is weird and even though it MAY have gotten DM33 irl, I still think it’s worth moving down to give the Chieftain Mk10 atleast a half-lineup.