Well you'd think a coach in any shape or form is there to help players adapt to wicket conditions and improve in s general way. None of the batters improved last season, perhaps some of the bowlers a bit on occasions and the fielding was much of a muchness on previous seasons I suppose, perhaps a few more dropped catches but I don't have the exact stats.
Adams is gone, might have paid the price for the awful batting and the non-progress of Prest amongst others.
I really doubt that Domingo was here long enough to make much difference to individual players.