This is NOT football. In football, you kind of have to worry by necessity if studs aren't perfoming up to par, as after two games, your guys have played over 10 percent of the season already, and there might be a reason.
This is not a game of making rash decisions. You drafted people for a reason (for the most part). You sit studs or do something stupid, you are just shaving off stats, stats that you made specific decisions based on comparisons to other players. Sometimes, 5-6 home runs is a plateau that you pick one player over another. You sit your hitters a couple of times because you are overthinking, and you miss those. And if you are going to do that, why not just draft an "all solid team" and see where that gets you?