Hope you dont mind some feedback!!
First, this is an absolutely incredible mod, amazing work, well done!!
But i feel like it could do with some improvements and tweaks.

Firstly being that Main weapons need a optic of some kind, id suggest the built in tank optics Arma 3 has as when playing as a tanker with other W40K mods the crosshair used isnt very clear as its quite chunky and sometimes isnt centred very well.

Secondly the Heavy Stubber Autocannon needs to be able to turn and aim, currently it seems to just be fixed to the knight and is so hard to aim properly its practically useless, which is a shame as its supposed to be a very capable anti infantry weapon, id suggest making it linked to the sights of the main weapon like a Co-axial Machine gun for example.

Third and finaly, while the Core Temperature mechanic is fine, i feel like it could do with some kind of Coolant ability/Consumable that rapidly stabalises the core temp, as going above the 45% temp range can take way too long to cool down on its own and is kind of a anoying mechanic as youd have to disengage from combat, hide and wait 3 to 4 miniutes for the core to cool down and thats kinda boring from a gameplay perspective. Including some kind of emergency coolant that can only be activated like once every 5 mins or as a consumable would fix this problem while still forcing the player to be tactful with there engagements and usage of this ability/consumable.

thanks for reading what my thoughts are on this amazing mod and i hope this feedback can help you improve on what is already an amazing mod!!

Will we get better Optics and different Knight Variants? The Twin Linked Rapid Fire Battle Cannons, and the Heavier Knights like the Castellan, Which is basically a heavy artillery version. Its a Super heavy Knight of the Dominus Pattern, and it features a LOT of guns.