Why the hell is SDI an argument against EVERYTHING EVER? Sure it's good to theorize everything that you can succeed to get out of with using sdi and how much OMGPWN you can bring to them once you do, but I have met very little people who SDI, and who even if they do so, SDI even a little consistently. As far as I know Snake's Nair is still a ridiculously good move and peach still hits dem Dair strings.
Sure SDI is so good for the theorypeople here that want to prove why every move in the game can be considered a bad one, but that's not going to help anyone. People, if you discuss, discuss real options. It's really frustrating to sit through 200 posts of people whining over **** "not being a valid option" because it can be SDI'd of.
Let me ask you the question right here and now, who consistently SDI's every move that becomes a little worse when being SDI'd and punishes consistently? Everyone that says they don't should not make a ****ing big *** **** deal about it everytime they enter anything slightly resembling a MU discussion.
I have no clear opinion on Kirby's tier list position. But I think that if Doubles performance for each character was to be taken into account for tierlists, he would definitely be able to rise a few spots.
TL;DR SDI is not a good argument, so work around it. Give it but a little mention is a sentence, but do not revolve an entire debate around it. Strings are still in brawl, I have yet to see someone who SDI's good enough to not get combo'd ever. Not even M2k
EDIT: Oh and ofcourse I don't mean Fthrow Uair blah, but then again that **** is predictable as balls. I mean on going strings in progress, like someone consistently sdi'ing kirby's utilt so he can't follow up with bair.