Well no. At right-back we have two very promising players (one of which is a CB) to provide that 'depth' when Seamus is out. They'll get their chances and hopefully take them.
Issue is, as Seamus is out for six months, we shouldn't be going into a season (which could be very very busy) with two 20-year-old full-backs, one of whom has a huge 70 minutes of game time in the Premier League...
So instead of bucking Kenny's progression with a 'huge' signing, it's surely sensible to get in a player the manager knows and trusts (on a free) as back-up to both Kenny and Holgate?
I don't think this is a case like Cleverley's, where Martinez viewed him as the answer to our playmaker issues...