For me of the 5 players you mention only Mugabi would be shown the door, as he's a bombscare. The other 4 had their moments at times when they were poor but generally they were OK, especially McGinn and I thought Blaney after an extended run in the team was improving week on week.
If we sign a right back ie the Australian boy then SOD will be a very experienced back up. For me the biggest issue we had was a goal keeper more scared of crosses than Dracula, Kelly inspired no confidence in the defenders in front of him, I lost count of the number of goals we lost due to failing to deal with balls into the box.
So we're going to have a new keeper, at the moment it's Oxborough but whether he's no 1 or 2 is anyone's guess, but one who commands his area and ventures off his line will be a vast improvement
Let's see who we bring in to improve the defending and midfield before we get stressed about who we've re-signed.