If that was all it took to get Brodin 30 other teams would be interested.
Not sure 30 other teams would be willing to give a prospect of Suzuki's quality for Brodin.
The way I see it, Brodin's is a bit of a poor man's McDonagh.
Last year, McDonagh and Miller were traded for Vladislav Namestnikov, a 2018 first-round pick, a conditional second-round pick in 2019, defensive prospect Libor Hajek forward prospect Brett Howden
McDonagh at that time was a #1D with 1 year left on his contract, Brodin is a #3D with 2 years left. Given the contract difference, I would say value is similar with a edge towards McDonagh.
So the trade could be broken down as such:
Miller for Namestnikov and B prospect (Brett Howden)
McDonagh for late 1st, conditional late second or 1st and C prospect (Hajek)
So value for a top 3 D would be worth a late 1st a 2nd and C prospect
In my opinion, the OP's proposal is fair given that Suzuki, who has progressed well since his draft is probably worth a late 1st and a 2nd and Schlemko is pretty ,uch worth a C prospect