Litchtman's analysis is fine for what it is, but he too easily dismisses Lester's ability to get through the order the 3rd time as "luck". Nothing will convince me that pulling Snell was the right move, but I'll admit that could be a "me" problem.
Back on topic: If baseball was to become a game where the 3 outcomes were the only possible outcomes from an at-bat, with everything else being as common a missed FG from the 2 yard line, then the game will become even more unwatchable. So I don't consider rule changes that prevent that outcome as necessarily gimmicks. Rules have changed before and baseball survived. Walks used to require 8 balls, and batters would get 4 strikes at one point. Over the course of the decade of the 1960's, OPS declined by over 70 points, which resulted in the mound being lowered. No need for a 5-4 9 inning regular season game to take over 4 hours.
So, implement a pitch clock to move things along and let the David Price's moan and groan. Pitchers get limited number of throws to 1B per batter. Limiting the number of pitchers on a roster is fine, but seems more like tinkering. Not necessarily in favor of removing the DH after a pitching change, not because it's a stupid idea, but because I doubt it has the intended affect; the novelty of relievers batting or being removed for a pinch hitter will wear off after a while.