I think some of you are wildly undervaluing Harrison. In his last MLS season at 20 years old, he had 10 goals and 3 assists. At 19 he had 4 goals and 6 assists, actual production, not this hope/wish/think they will be good even though they have done absolutely nothing copium people keep projecting on Fernedez and Ojeda.
Jack has since gone on and developed enough to earn consistent time in the premier league. He would be a massive upgrade over Santi and our current wingers. At 28 he's still in his prime. Obviously, CAM is a bigger need but I'd much rather Harrison over any typical Lee DP signing. If we go off Lee's track record we will end up with some CAM from a CFG affiliate club that makes barely over the DP threshold. Heck if Lee didn't waste a DP spot on an overpriced slightly above MLS-average CB we would be in a position to get Harrison and a DP CAM.
I don't doubt that Jack would be a solid signing and I would love to have him back, but I just don't think he's worth a DP spot. DP spots should be used on big impact players. Lee already broke that rule signing Martins as a DP though, so I suppose anything is up in the air.
If the choice were to sign an unknown as a DP with hopes on his potential or sign Jack, then Jack all the way. That is my biggest fear; that Lee will go out and sign a young DP that is unproven and will not move the needle for us because he's "young, raw, and needs to develop"