Haven't finished all the matches for today, but CLG looked strong yesterday. Considering where I think CLG will end up, C9 had a tough first two matches, but starting out 0-2 isn't a good sign for them. TSM looked dominant for week 1. Sven is looking better, which I kind of figured with doublelift back. It wasn't intuitive, but a lot of his problems were bot lane's fault. When his bot lane isn't winning, it's rarely pushed out, so Biofrost has less chances to put up a ward in enemy jungle. Which means it's harder for them to track the enemy jungler, which often means Bjerg can't play his lane aggressively either. Or, when Bjerg gets a chance to roam or put a deep ward, he often had to roam bot to relieve pressure. All these little things meant Sven's invades had a lower chance of success then they normally would.
One of the staples of TSM's strategies on red side was putting a ward near enemy gromps, TPing hauntzer down with Sven and/or Bjerg roaming, diving enemy bot lane under tower, taking tower and often dragon right after, while letting the enemy take top tower. They come out up a kill or two, equal on towers and ahead a dragon. It's effective, but they often had to do it to help bot lane or else they lose their tower there for free. The better teams knew it was coming and often beat them to the punch, heading off the sven/bjerg roams to disrupt the plan.
The point is, they use this plan because their bot lane rarely ever 'won' to the point that they could take the tower on their own. They required the team's help to do it. With dlift back, that will sometimes happen, freeing up Sven/Bjerg to make an unexpected play elsewhere. It adds more flexibility to their strategy.