LCS should only relegate after Summer split
A lot of promising teams are coming in and out of the LCS at such a rapid pace they have little time to develop or get their players used to each other. It's hard to be a fan of a new team when they drop after a single split as well. Instead of bringing new teams in and out each split through relegation, LCS should only hold one relegation tournament after the Summer split. This would give new teams a full year to rise to the level of more established teams.
It would also allow alternate seeding into the relegation tournament - a reverse of the Worlds-qualifying system. This would more accurately reflect the strength of the teams and allow teams to improve between splits, or allow teams that struggled early in one split to make it up in the next.