Not gonna lie, i know the original poster for this made their post a long time ago, but I feel like all either of those options do is ensure the game dies.
1. One stock is the worst version of attempting to change the game up period. If people want to talk about spectators being a reason to care (they really shouldn't), then 1 stock is less fun and more luck based to a degree than the usual 3 stock. Why do so many people want Smash 4 to be 3 stock, but think the best idea to save brawl is 1? Pretty much 1 stock makes comebacks impossible and would increase the amount of camping because why approach? you have 1 stock + 3 minutes, people time each other out in other fighting games, and still would in smash. May as well have 3 stocks so at least the game is still interesting.
2. Anyone suggesting banning MK or IC's is asking for the game to actually die. However much people want to be on this honor-bound train of saying "to save brawl we need to get rid of the best 2 characters in the game". If you do that, you turn away every person who stopped playing Brawl for other games, and who'd be interested in coming back. Sure you can say **** Ice Climbers mains, go back to Melee/PM and it's a better game, but what about the Metaknight players? For every 1 IC's, there's bound to be 3-5 Metaknights at one given tournament. Many people who dislike the game's speed may enjoy MK as the only character they can manage, those people who got really good at the game using either of these characters are more likely to leave for good and let the game die because they don't have that option anymore. Who wants to go back to a game where when it died, it was a fun game, but along with the general negativity that led to the game's decline to begin with still existing, now the character they spent 5-6 years on finetuning or getting good with doesn't exist? Regardless of their love for brawl what motivates them to go back if the character they find fun can't be played?
Either way, easiest way to at least ruin IC's in terms of being number 2. Bring back the stages that absolutely ****ed them. Bring back Frigate, Delfino, Brinstar(I'm only half kidding). And the others that were perfectly fine CP stages but got banned because of Metaknight. Ban Metankight from being able to CP to these stages, but allow other characters to go to these stages at their own peril (if the other player CP's to Frigate, the MK gets to stay MK, but if the MK was CPing he could not go to Frigate). Who knows, it might help with all of the salty people who cry about dealing with playing against possibly one of the top 5 hardest characters to learn in smash period if not only with the gameplay styles they have to deal with and the undeserved hate, if the stages that made their main form of strategy kind of terrible existed as well.
Either way Brawl was fine, we need to fix the mindset of the community before we ever consider banning characters or trying to pander to audiences.