Dusty will make any team better. Can he take North to the finals next year? No. Maybe not the year after that either. North are going through a rebuild at the moment and have some studs in Brown, Tarrant, McDonald, Neilson, Pruess, Simpkin, Mountford, Durdin, Vickers-Willis, plus pick 1 or 2 this year. If they get Dusty, good on them, but they will have destroyed their salary to the point that when these kids want to get paid at ages 23-24, Dusty's mega deal will force them to let go of at least a few. If you have Dusty but lose Ben Brown and Luke McDonald to contending clubs, is that a win? I'm not sure.
Plus with Cunnington and Zielbell being 25-28 (having a stab at ages), their timeline doesn't add up. Dusty is turning 27 next year, the time where you'd want to be either contending or at least 5th/6th. Kelly, at 22, is who you want. If that doesn't happen, build conventionally - hit the draft for two years, then go for a stud.
I think Dusty will stay. Can see why North want him but they should really be taking the long view. Remember they chased Higgins, Waite, Dal Santo a few years ago for a premiership tilt that didn't get them there, and got them to the position they're now in.
Just my thoughts.