1) A hit/walk/home run effects the outcome of a game much less when you're down big or up big in a game near the end. Yet in advanced metrics they are weighted the same as a two run homer when you're down by 1 in the 8th inning, etc etc.
2) A single with a guy on second base with two outs should be valued higher than a single with nobody on base. 90 percent of the time that single creates a run.
3) Advanced stats calculate if the season were one big 162 game, "game." It reality, their are 162 individual games and the object is to win each one, one at a time.
4) Whether you agree or not, their is such a thing as being clutch. Guys press all the time.Ever been at the plate in a high pressure situation? Totally different. It's a different beast. If you don't get timely hits, you very rarely can win a game. Advanced stats disregard clutch situations and value each situation the same.
5) Being able to create runs on your own, i.e. hitting home runs, should be valued much higher in advanced stats than what it currently is. Hitting home runs means you rely on nobody to get you home. It also changes games dramatically.
6) Defense - UZR is a joke. Every measure tool is. If you know the stat and analyze it, it's one of the most flawed things in baseball. It's very circumstantial and why anyone would take that stat seriously is beyond me.
7) RBI's DO MATTER. They matter a lot. They are ultimately what puts runs up on the board. You need to have good situational at bats at the least to get them 99 percent of the time. Situational baseball = winning baseball.