IMHO, If you want it ask...
I'll always give you what I can, I recently moved ANSPs the one I work for now encourages track shortening with gusto, my previous employer frowned upon it and effectively made it illegal (outside SOP) to provide track shortening unless it was to solve an 'immediate' conflict or to improve an arrival sequence.
It never bothers me if you request it; it
does bother me if when I say I'm "unable" to provided it that I get questions like "when can I expect it" or "where is the traffic" etc; although since I rarely see a particular airline anymore (white rat on red tail) the 'challenges' are much less frequent.
