(More devil's advocacy.)
There are reasons that hitters don't try to "adapt" to the shift.
1) Bunting and/or going the other way is much harder than people realize, especially when pitchers are throwing high 90's with movement.
2) Hitters are afraid of messing up their swings.
3) Instead of going the other way, they swing harder with more of an uppercut and try to hit more home runs.
Run scoring hasn't changed that much because of the shift. It's still around 9 runs per average game. But there are more homers and a ton more K's. Much fewer balls in play.