Limiting shifts basically just means going back to how teams played defense like 8 years ago. I'm pretty sure I can live with that. The pitch clock is going to be great once the adjustment period is over. And if you're worried about the bases being like 2 inches bigger, I think you may need more outside interests.
Both the defensive shift limits and larger bases would seem to make a guy like Mateo - a basestealer with lots of range - more valuable.