I don't like the following:
1. instant replay - which isn't instant
2. the potential concept of relying on robots to ultimately replace umpires
3. a homerun or a strikeout with a de-emplahsis on many of the things that some baseball fans still love such as bunting, hitting and
running, and stealing bases.
4. pitdhers not pitching to conatact
As the game changes, i don't think that it is the old folks that you have to worry about losing.
Numbers have always been important to the game and will continue to be. If the numbers dictate change, I hope that they are the types of changes that the average fan wants to see. I don't think that the game is as entertaining as it once was and I don't think that I am alone in feeling that way.