Tampa was in a position of zero leverage from the get-go because Raddysh was set to become UFA. He holds all the cards. It goes without saying that if there was a better deal on the table for him to sign with another team, BriseBois would have taken it. So, it comes back to either letting Raddysh walk, or getting something for him. On top of that, Toronto was very clearly the front runner for his services anyway. So unless you were crossing your fingers for him to hit the market and hoping he signs with a non-division rival, which all signs pointed otherwise, BriseBois gained an asset for someone who wasn't going to be on the team.
The "helping out a division rival" is complete nonsense and it seems very evident he would have ended up in Toronto regardless. It's either get a 5th rounder, or get nothing and JBB did exactly what he should have.
You are still missing my point. Having no leverage with negotiating rights with Raddysh does not mean we had zero leverage in a trade with Toronto. I already gave the example, last year Toronto did a sign and trade with Marner and got Nic Roy, and no, a 5th round pick is not enough incentive to grease the gears for Toronto and make this happen


