Currently we cant change weapons engineer squads can deploy, which results in their squads strengths been too weak in High tiers specially with AT weapons, after all a BR1 canon cant do anything against any BR 3 or 4 tank, and it is especially useless in BR5.
So I propose that squad weapons such as Heavy MGs, AA guns and AT guns get automatically upgraded or down graded to the current max BR of the battle in order to make them usable in any BR.
It is supposed to be the case with 45-57 mm guns on low BR and 75/76.2 mm gun on high BR. However, the delayed update completely broke this (and the paratrooper box equipement), so lets just hope we don’t have to wait for too long for this to be fixed