One issue is that teams are so good now at setting up for that quick kick out of a clearance. The onus is now on maintaining possession by hand out of contest until you can find someone on the outside.
Dave is a terrible handballer. When he arrived at the club he could not handball on his right, which is pretty unusual for an AFL draftee, let alone a top 10 pick. He's improved in that regard, but it isn't instinctive, and and he's slow to get rid of the ball. His left side handball is okay, but well below AFL midfield standard.
The WB showed last year the value of the handball in beating a high press. Those with substandard handball skills were sent to "handball school" to work on this skill.
This is why I think he isn't seeing much center square action. While he is able to generate good clearance numbers when given the opportunity, the quality of those clearances are not high. A quick kick out of congestion often ends up sling-shotted back over your head.
I reckon they will persevere with trying to find another position for him for this reason. If not in the seniors, then at VFL level. He's got two years after this to find a new role. I don't think his opportunity will come when Watson retires as a center square specialist. The likes of Langford and Parish will get more opportunies then.