I see a lot of posts from high gen people that dislike the new exp system because they are now unable to change builds quickly. I do not agree that this argument should be used to bring back an exp system where high gen people could get new heirloomed items extremely quickly. I feel that heirlooms should be hard to get no matter what generation you are.
Instead why not make a new retirement option which does not give you a new heirloom but instead only drops you to, as an example, level 30 at the same time as reseting your skills and stats. Doing this allows respecing and gaining heirlooms to be balanced separately which gets around the problem that if you change one, the other might suffer.