I understand the logic, primarily because of the almost certain innings restriction. If the Cubs were going to have Cade Horton at full strength through the rest of the season and the playoffs, I don't think you really consider trading him for a guy with only 2 more seasons of team control. But when their objective is to go big this year, while also keeping an eye on the future, trading some future years of Horton to have Gore now (and for a couple more years after) becomes a possibility. But if you're considering trading Horton, I can't stomach Horton + Caissie. That is too much.