I think maybe it's possible for them to do too many - if those types of therapy conflict or contradict each other, or if like Stopdog suggests, they are a 'jack of all trades'... But I like that my T uses an eclectic approach, and that I feel she tailors our sessions to suit me and my needs at the time, rather than using a set method and expecting me to comply... If that makes sense! I think it also shows an open-mindedness...