Quoting: littlejerryseinfeld
As the cap goes up, so does the market price. Eventually someone will get offersheted too. Unless you are saying Mathews is worth equal to eichel as a percentage of cap
I have gone over this in some past posts but I will say it again.
Offersheets I think will soon be a normal thing, but not in the sense that fans think of them. Offersheeting a star is a waste of time, opposing teams will match it unless its utterly insane, in which case they will take the 4 first rounder.
Where an offer sheet makes sense is when a team has to sign their top guys and some young promising depth players are needing contract as well. So Toronto next season.
In the Leafs situation, they will prioritize Marner, Matthews and Nylander. That or Dubas is an idiot, which he clearly is not. So once they are signed they will be a lot closer to the cap and will have to sign Kapanen, Johnsson, Leivo, Orzhiganov etc. As they whittle that list down, they'll get closer and closer to the cap ceiling and that is when offer sheets will make sense.
Let's say Leivo scores 50 points this year (Just a hypothetical), he could be looking for a deal that pays him 3+ mill a year and want 3-5 years. Toronto just won't be able to afford to hand out many deals like that. So an offer sheet of 3+ would get a team a decent depth player with potential to progress further and cost only a 2nd round pick.
That's is where offer sheets make the most sense.