As a pitcher there is no way I would want a 30 second pitch clock, they already have to throw every 90 seconds now. I do like the universal DH.
As for the relievers what they're doing is trying to stop these managers from coming in and changing pitchers 3 times an inning.
I think a pitch clock benefits the batters more as the pitcher might be rushed and not able to get into a rhyme as much. I'm not against a universal DH either, however, I am against forcing a pitcher to face at least 3 batters. I understand the reasoning behind the rule, but again, baseball is a chess match. You're trying to win games and I think it might diminish the product if a pitcher has to face a batter he normally wouldn't of.