Nah, final Bo9 ftw. I mean, it's a final, I don't think time will be a big problem for maximum 9 games (what I don't think will happen anyway, more like maybe 7 games), you don't have to play them in a row, can split em in 2-3 days, you know. And the rest Bo5, from NOW on already, I'd say, if you play 3 or 5 games, doesn't rly matter, it's only like 30 minutes more, if ppl dont have time for this, then they shouldnt play worms at all, actually. It's not like he has to spend weeks 24/7 for this and Bo5 makes it much more skill, few luck games doesn't matter cos the better player prolly woulda win in the long run.
Summary:
No group stages now anymore, 1v1 all the way, Bo5, semis Bo7, finals Bo9 ftw. Playoff tree would have been cool, you straight can see who's out, who's not, who you might get to play and so on, that tree > group stages and anything else imo. What ya guys say?