With the cap going up
9-15M for a 1st line player
6-9M for a 2nd line player
3-6M for a 3rd line player
Love it or hate it that's likely the new normal
If Lindholm was just the average 50-60 pts player he'd only be worth 6-7 range, but his defensive prowess and faceoff ability makes him more valuable than your "average" 50-60 pts player.
Even once he declines in his mid-late 30's he can still be deployed defensively, bringing a lot of value. In 6-8 years 8M will likely be the new normal for a 3rd line center.