supporting strict equality filter in odata export is definitely not beyond consideration. the only issue is that we open the can of worms that is parsing odata filter expressions, and rejecting all the cases we can't handle (which will be most of them).
perhaps if our team grows we can entertain the idea of actually servicing a broad range of filter expressions. for now i think supporting strict equality filter over odata is a reasonable ask, but with our team as small as it is i'm not sure exactly when we will get to it. right now the focus is on web forms rather than on export.