Parf may not be classy, but at his best he can be an accumulator, an extractor, and a greatb tackler. Also loves a goal.
The tackling part I'll give you but he's never really had big clearance numbers or shown the ability to accumulate.
I guess the model for Parfitt would be Tom Atkins, who shares similar qualities/limitations. They are both stocky tackling players that are agile as hell but don't have breakaway speed. Atkins' ball use is a level above though, and even then, he has had to overcome a lot with his rare determination and intensity (I don't think Parfitt shares that).
Parfitt can and has played regular AFL-level footy, but we've got better mid-paced fringe 6'0 guys in Bruhn, Atkins, and perhaps soon, even Jy Clarke. I don't think there's a long-term place for him at the Cats. It looks like we'll transition in Knevitt and Holmes as the taller bigger-bodied mid replacements (assuming they are still putting on weight.