I'll start with #1
XSET
I agree with your above TSM point, but not this one. XSET have always been on the rise, they have an amazing team(A notable stat I wanted to bring up is in challengers 1 main event, 3 XSET players were on top 5 first bloods), and they are really innovative. I think the innovative part is what will make them stand out. They brought out the fortnut comp against NV and 100T and I think with practice they will be insane on it. They took initiative and started playing the meta immediately, and if they keep doing that they will stay sustainable.