I wouldn't be concerned about the promoted club picking up players from the relegated club
IF it turns out to be Toronto they'll be setting their sights higher. They can pay transfer fees to get players and they'll doubtless have their eyes on players from the NRL. They won't need to be picking up scraps from London!
There'll be a fair few from the SL OOC list who will be dropping down. They might not want to, but they won't necessarily have the choice. Clubs will be promoting up some of their younger players, as well as signing people from abroad, and so there will definitely be some who will be surplus to requirements, just like we signed people like Webster and Evans this year.
So why not us signing up some of them? Who else is going to have a bigger player budget than us next season in the Championship?