NA LCS looks so exciting this split
With the exception of maybe Echo Fox and Envy, the remaining 8 teams all look to currently be close in skill with each other. Last year in Spring we had IMT and CLG who were clearly better than everyone else and IMT, C9, and TSM in summer. This year the series are close and even the 2-0 victories have really competitive games where you aren't sure whose going to win. (c'mon guys flyquest is 2-0)
Combine this with 10 bans so significantly better champion diversity (especially after they nerf the must pick/bans; leblanc, camille, rengar, maokai, kha'zix, and poppy and buff lucian to bring back lane bullies in bot lane) and I think this split is going to be amazing to watch.