The thing about TOI *per game* is that it only takes into account games that players play. When Everyone was playing, he was Florida's 5. But they weren't all playing a lot of the time. Resulting a year where OEL had more 5v5 minutes with one of Forsling or Montour in Florida's top 4 than he did on the bottom pair with Kulikov
Sure but TOI per game a more accurate representation of how the player was used over the year. If anything it's skewed heavily to make OELs usage seem more important. In the playoffs, with a full lineup he played 15:27 a game. Still 5th out of 6 D to dress and a full 3 minutes a game less then Mikkola who was 4th.
"When injuries happened and they had no choice he played more" isn't really a positive argument to make in favor of a player.
Regardless, I think he's fine at 3.5 no need to try and pump him up beyond what he really is.