2016 shows what he's capable of: 43 contested marks from 21 games, equal 9th, and all but one above him played more games that season. That year he was a contested marking beast playing as a key position forward.
Obviously last year and this year he has had injury, illness and personal reasons for missing games. Plus he's been used this season as a running high HF and mid/wing where contested marking isn't high on the player stats. IMO he should play a greater % of time as a leading key forward. Not all, just more.
I've said before I'd like Jesse to stay beyond 2019, and I acknowledge he is settled in Victoria. But his value certainly can be discussed and I'm sure Jason Taylor and Todd Viney have done so. Due diligence in an era where contracts mean little and trade landscapes shift quickly. There are many allegedly shifting this year regardless of contracts, denials and free agency: Shiel, Lobb, Hanners, Neale, Polec, May, Wingard, etc, though each has their own individual circumstances. Most of those were 'settled' 6 or 12 months ago.