All fair points. Our back line is our strongest part of the ground, so my question would be 'did our back line get worse when Jones came in?'
If no, he's younger and more athletic than Rowe and probably a younger version of ASOS but maybe not as level headed. Bigger question is probably can he coexist with Weiters, Marchy and Plow?
I'd argue Jones and Rowe were about the same in terms of impact. Jones is faster, more athletic, and did more 'Wow' things while also getting caught out of position more and giving more the other direction, while Rowe played the system better, but contributed little other than rugged defence. Our backline was probably at its best with ASOS in that role, but he can't stay healthy.
Next year, we might end up just going with Weiters, Marchy and Plow. Macraedie could also offer a real advantage - he's the biggest and most athletic of them, and has ridiculous upside with another pre-season or two. A backline of Weitering, Marchbank, Plowman, Macraedie, Docherty, Williamson has an insane level of talent, and a lot of attacking potential too. Just a matter of whether the young guys are ready, and whether the midfield can provide enough support while they keep learning.
On a Jones-related tangent, earlier in the year I spent a lot of time arguing that he made a huge impact as a forward. Last year we went 6-3 when he was playing, a 1-11 when he wasn't; that was with him as a forward. As a defender he probably 'won' us two games we wouldn't have won otherwise (GWS just fort he surprise factor, Hawthorn with those spectacular saves). For the last two years along I reckon he's worth the pick we gave up for him!