I agree. I did not like that they just brought Carson back and replaced Thomas. What happened to Carson’s palsy? What happened to Mary’s support for Thomas in series 6?
That being said, as an ardent Thomas fan, I am cognisant of the fact that the plots that centred around what was happening at the castle were not very complex or developed. At least, that’s my opinion. They were meant to be more of a means to highlight everyone’s favourite characters before their curtain call. From that perspective, I’m happy that he left, because I thought Thomas’s plot was far more compelling than him simply becoming yet another character looking stressed in the background and swooning at the thought of serving royalty. I did not appreciate him being slighted in the way that he was, however.