I'd just prefer continuity. Unless the actor is terrible (in which case you should re-cast the part and re-shoot early on), or for some other reason it's just not possible to use the same person, it sucks to switch the actor playing a character who has been in previous movies.
That is especially true if the other movies were recent and/or the new actor looks, sounds or acts a lot different from the old one. Maybe they got the best person for the part, but it would have been much better if they'd had him for the previous movies too. (I'm assuming here that his character was in the previous movies since I haven't seen them, but if I remember correctly he was.)
Anyway, most of the characters they have are past their shelf date in my opinion...I think they'd be better off making some new characters anyway, and they could add some more diversity while they were at it. Hopefully with less ridiculous stereotypes this time.