My fellow cubs fans are over-reacting because its not a big name. I personally love the hire. No MLB managing experience, but has plenty of minor league managing and was Mexico's WBC manager. But that's not the point, he's widely known as a great teacher of the game for young players and is extremely well liked for his ability to help players adjust and develop when they get to the MLB. Plus he is bi-lingual. This is huge with the big time prospects about to get to wrigley. They need someone who can get them ready to play in the MLB, regardless of managing experience or not. He may or may not pan out in that aspect, but does it matter? Because if he does, you hit a home run, if he doesn't he gets replaced in 2 years when the young stars are now in place and transitioned to the MLB and then you bring in an experienced MLB manager who has been there before if Renteria struggles. It's an absolutely solid hire in my opinion. The guy comes with HUGE recommendations from all over baseball. That doesn't come easy.
Some of our fan base is just getting too antsy. This was always about a 5 year plan when Theo/Jed took over and you can see it working with the farm being arguably the best in baseball and the time frame has started to speed up a little with the unexpected rate at which Baez and Bryant are going to exit the system and graduate to the bigs with Soler and Almora right on their heels. Now that a few arms have started to emerge (Edwards, Johnson, etc.) it's looking extremely bright right now.