Not at all. We were all ecstatic by the signing. He's clearly a very good footballer that hasn't adapted to the league so far. It's possible he won't but I think he will in time.
But Trent missed games last season, quite a few and his absence wasn't that noticeable. No one is denying he's not a loss but he was also a very unique player. No other team in the league has a player like him and are still managing to win matches on a consistent basis.
Typically there's noise that the outcome of the city charges is close. Certainly much before the end of the season which means Arsenal win it be default anyway.