The developers do pay attention to bug reports but given there is now 1800+ vehicles in game there is only so much that can be done in terms of new models.
Generally even though there is always a positive reaction to them when we do make one, it really means not much at all. Interest in them in terms of games played does not really show any interest spike and people very quickly forget about them. It's not the same as adding an entirely new vehicle or variant.
We have to prioritize gameplay bugs and the fact the vast majority of vehicles in game do have excellent mode