An interesting addition to the mod. I have a suggestion for the general development of your mod.
How about mobile weapon platforms from xcom 2012 (S.H.I.V.).
I already said something about it in a separate thread (
https://openxcom.org/forum/index.php/topic,9289.0.html)
In xcom 2012 S.H.I.V. is analogous to tanks, only instead of 4 cells they take 1.
In essence, it is a mini-tanks, which can be without harm to the main squad to swallow and deal damage, as well as scout the area.
The game already has everything to implement the idea. Drone scout is essentially already a S.H.I.V. All you need to do is change the armament and play with the armor settings.
In my game, I changed the shotgun to a machine gun m-60, as well as slightly increased the frontal armor. It turned out a kind of assault version of the mini tank. After I went into lasers and alloys I once again tightened the characteristics to those of the analogues.
Of course, the armor characteristics should be less than those of full-fledged tanks. Compared to full tanks, the S.H.I.V. has an order of magnitude less armor, but they can be placed in greater numbers. And they are also able to storm rooms with the squad.