In case you have advice, some other things I’m gonna try to do:
making the bipod mg42 into a team weapon
Making the Covering fire ability on Cav rifles apply to grens & cancel when the enemy gets close range
(I’ve already added the ability to them, and made it require the mg42)
Making the Flack HT stun instead of suppress and fire on the move
I am not sure for the bipod mg42. The prop lmg 42 as in a dropped slot item is different from the weapon, and it is basic prop. You can probably mimic a team weapon in the weapon table and increase the drop rate to 100%, but if it were to wiped squad caring it, the squad that would pick it up would be entirely 'transformed' rather than leaving a model or two behind.
Grenades have a minimum range. Not sure if would work but it may cancel it out.
The flak half track can be enable to fire on the move.
First remove hardpoint one. This only shows the set up display and is independent of the weapon that fires.
Place hardpoint 2 in hardpoint 1's spot, and remove hardpoint 2.
go to weapon\west_german\ballistic_weapon\tank_gun\sdkfz_251_17_flak_20mm_flak38
under moving make sure disable_moving_firing is set to true
under set up set the duration to 0 and instant_setup to true
under behaviour change non_moving_setup to false
I think that is everything to adjust the moving but the 222 autocannon can be a good reference
For the stun
go to damage add either under on_penetrated_action (before damage) or post_damage_actions (after damage) for the stun. Trigger_critical_action is used to apply a stun. Panzerfaust, Puma's Aimed shot and many other weapons can be helpful.