Frolik has decent hockey sense, and that's it man. Stalberg's shot might not be that accurate, but at least he shoots hard and can cause rebounds. Frolik has one of the weakest shots I have ever seen. If you aren't a shooter, you better be a setup guy. Frolik is NOT a setup guy, either.
Again, what does he do really well? What is the trait that separates him from being a third liner or a top six player on a contender? He is weak in the corners and gets knocked off the puck easily. He's not a good forechecker. He's not physical. He doesn't have a good shot. He doesn't create space for others, or set up goal scorers. He doesn't block shots or crash the net. He can't kill penalties all that well, and doesn't play the PP.
Three points in four games in the playoffs. Wow, that a great sample size. How about the 63 games during the regular season in which he completely sucked ass? Five goals and ten assists and the second worst plus minus amongst Blackhawks forwards. He had the worst shooting percentage of all Blackhawk forwards. Took 117 shots and was able to pot 5 of them. For comparison, Bolland took 126 shots and potted 19 of them.... Frolik has played 91 games with the Hawks, and has 24 points to show for it, and a -10. His shooting percentage over that time is 3.8.
You are ignoring the fact that Frolik brings NOTHING that the Blackhawks need in their top six, and plays a position they are STACKED at. He is a top six player on a shitty team, and that's it. He doesn't fit in with this team's top six based on their skillsets, and what the top six is lacking. Which is why he is useless to the Blackhawks unless he can be a good third liner. Which he showed last season, he could not.