I believe taking an off-season break away from triathlon is highly beneficial for athletes of all levels.  In the past I’ve taken breaks of 7, 8 and 10 weeks (it doesn’t have to be that long).  Sure, I lose some fitness, but when I get back at it I’m always motivated to get that fitness back, and I use that momentum to push beyond where I was last season.  Taking time off shouldn’t be feared, it will let you reset, mentally and physically, for new races and goals.