Brutal Mario is an impressive display of ASM hacking, but little else in the hack offers much in terms of enjoyment. Level design in particular suffers, and it's borderline kaizo at times.
That being said, isn't there a policy on this board about modifying other people's hacks without permission and posting the results? I mean, I know there's certainly a 'bad taste' factor in the ROM hacking community, but I also recall places like SMW Central not really caring about it. Either way, I think I'll wait to see if/when Carol releases an update, rather than focus on the works of what sounds like a bunch of excitable thirteen year-olds.
Edit: Oh hey, the poll certainly seems to agree.