Unless I'm missing something, 2 mb x4 = 8mb, so bip102 + SW is already equivalent to the 2-4-8 "compromise" proposal (which by the way I never liked, because I don't think anybody should be in a position to "compromise" anything and because I don't see how "let's avoid an unavoidable economic change for a little bit longer" arguments can reasoably claim that "we need to kick the can down the road exactly 3 more times" or whatever is the reasoning behind it).