Pittsburgh has their own version of Hyman in Carl Hagelin. He plays largely the same role, plays tons of PK time, and he's the forechecker/disruptor for Malkin/Kessel.
Sometimes the Penguins get swamped with penalties and Hagelin's gotta play more. In order to keep his best players playing adequate time, Sullivan will stack lines in situations such as right after the PK, offensive zone starts with an exhausted opposing group, trying to tie the game up in the last minute, etc etc... The thing is, PK time takes away from ES time. When this happens, your best ES players will have their overall ice-time reduced. Sullivan knows the importance of having his best guys play their minutes, so he will do simple adjustments in game to make sure his guys get their ice-time. You'll NEVER see Hagelin lead the Penguins in ice-time, Sullivan understands how stupid that is.
Babcock deviates from all of the above, which results in incredibly stupid things like Komarov and Hyman leading forwards in ice-time. His ice-time management will result in less minutes for his best players and more minutes for his plugs. This is literally what he gets criticized for every day. This is exuding indefensible stupid shit like Hyman playing more PP time than Marner. Never under any circumstances should you take away PP time from your best players and give them to your plugs.
Every team has their Hyman-clones. They just don't use them anywhere near the capacity that Babcock uses his. Hence where all the criticism comes from.
I don't know why I even bother going in depth on these things, the pro-Babcock types just completely glaze over his faults every time.
Like I said, if you're completely incapable of making a simple comparison of Babcock to other coaches around the league, you have no business debating any of this.