While I still don't have a complete grasp on how LGD plays, I think I can be confident to say that BLG has a very high chance at winning this series. LGD's recent match against AG was pretty dominant from start to end, but there are many factors that could suggest that they could play differently against BLG. While their first maps against NWG and RNG were not won too comfortably, BLG's second maps with the two respective teams proved that they were just miles ahead of their opponents, and if we see the same sort of form against LGD, we might very well see a clean 2-0 sweep from BLG.
2-0 BLG win.