Honestly, IF there really is an issue, the problem now resides with Farrell. If his onfield moves don't matter, he at least needs to manage the airplane travel, no?
1. How does fielding get more difficult in MLB?
2. Not many people care about Fielding % anymore. Most scouts think his defense is good enough now and is still improving.
They spent so much effort stating that he wouldn't be called up until he was ready that it makes no sense to call him up now if he's not ready.
He's ready. He can hit AAA pitching. There's nothing else for him to learn down there.
He has done a pretty good job. The only straight up failure was the Travis Shaw trade. However, Shaw looked horrible during the 2nd half of last year. No one was upset when he was traded.
If you listen to the recent podcasts, they are putting more of an emphasis on results with their rankings. The eyeball test has value, but you do need to supplement it with actual performance.