Is half-assed an aesthetic?
I don't know... you could say "how is this different from a xerox-ltraset-collage-whiteout-sharpie punk flyer from 1980 and not be far wrong. Except with those too, there are some that are amazing and some that aren't, and the difference is that some have wit, impact, balls, or whatever undefinable thing that ties them together makes them kick ass. Others just grab a bunch of shit and throw it at the wall, and fail. Or maybe once in a while succeed by pure chance. But if the aesthetic is to just not care, the successes are correspondingly few.