With the exception of the QB, that's an excellent practice squad from the standpoint of shadow roster depth. Most of those guys could step in and give you reps as injury replacements, both on special teams and otherwise. For example, if you had a rash of WR injuries, at least Boyce and line up in the right place and catch a football.
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I don't know if Aiken will be back as the long snapper, but it's pretty clear that the Pats weren't going to have him on the roster week one and guarantee his salary for the year.
I'll guess that Ninkovich will handle it for the first week. They'll evaluate this new practice squad guy, and then make a decision.