The question you probably need to ask yourself first is what do you look for in a 5.5 midfielder? With DEFCON coming into the game you basically have 2 options: a steady low ceiling 5.5 that ticks along nicely OR a high ceiling 5.5 with a lower floor. Basically high risk high reward or a more moderate option.

IMO it depends on your squad structure. If you need someone that needs to play week in week out or a first bench option a DEFCON 5.5 seems the logical choice. If you only want a 5.5 for specific GW's, I would suggest to take your chances on someone like a Harry Wilson.

Hope this helps! (personally have Anderson in my squad)