The problem for St.Kilda is that they need to use their first-rounder in the draft either this year or next in order to be able to trade future picks next year. They have designs on trading for King's brother in 2021 and want to use their #17 this year. St.Kilda have done plenty of spending in the past two years and just don't have the currency to get it done.
Agreed thats the exact issue, they want to take a pick in this years draft so they can trade next years potentially for Ben King.
This is why Saints need to get creative and look to bring someone elses 1st rounder in and thats where I think the Dogs first rounder comes into it.