How has he overachieved? I don't think anyone can look at the drop points record and say he has been better than Beale, when Beale was also able to beat them, dead rubber or not. Beale was criticised for losing 'the big games', Clement has been the same in the league, plus he drops to the dross.
Beale: Celtic D, Celtic L, Hearts D, Kilmarnock L, Celtic L, Aberdeen L
Clement: Aberdeen D, Celtic L, Motherwell L, Celtic D, Ross County L, Dundee D, Celtic L
We're walking into the same situation as Gio and Beale, ignoring the huge red flags because 'he needs his own players'.