I watched the Mexico/Puerto Rico game and the US/Venezuela game. It's been fun enough. The pitchers can be a very mixed bag. It appears that the better hitters are just hitting off a tee sometimes. I don't know how serious the tournament needs to be, but if some of the pitchers aren't going to ever show up, it can just be a quirk of the schedule going forward. Injuries happen at the WBC, but injuries happen in ST too. Gavin Lux is out for the year running from 2B to 3B. It's just the nature of participating in a sport. These guys need to ramp up for the season somehow anyway. Overall, I think it's good for the game.
IMO, a few of the countries in the tournament shouldn't have fielded a team. If you can't even get 10 people onto the roster that were born from that country, don't let them into the tournament.