The Potters hero is now playing in Bulgaria with CSKA Sofia.
The 34-year-old told The Sentinel: "He has done a good job. The team is playing very well.
"Obviously the style will change, and I think they will get even better next season.
"I have seen some games on TV, and I also watched the Hull game two weeks ago, so I still have an interest in how the team is doing.
"Mark Hughes has brought his players in, and he has done very well so far."
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