After playing the Snake MU more, I can say that it's more or less, no longer a "mental block" MU for me. Now it's just really hard lol.
I've played around with some cool stuff in the MU, it's pretty fun figuring out some creative steps in fighting him.
SH fair oos is our best option to try to punish snake ftilt on block, he can spotdodge, but you can usually hit him with nair or dair afterwards, and now he can't just whomp you freely with spaced ftilts without having to worry about punishes from our lol grab range and slower oos options.
Rarely go for jab mixups in this MU, at least at lower percents. If the full jab pops them up, that's all that matters, then you can start hammering with your landing traps.
The more you can figure out how to abuse him harder in the air, the better. It's really important to get those landing trap tricksies down, uair is a really good at provoking a response.
Also, this sounds really papery/theorycraft, but it also really helps to know how to DI out of snake's nair, like a loooooooooot. It changes snake from having a punishment for you trying to AD out of something and taking 25%, to getting maybe 10-15% and hitting him with dair/nair, which usually reverses the status quo on him. If you can do this, you can pretty much tell snake that he can't mess around with you in the air, with the exception of bair/uair.