My feelings about estradiol are that I don't really want to come off it because of all the added benefits of being on it. It has been suggested that even women who aren't getting any meno symptoms will benefit from low doses for other health issues (heart, bones, brain etc). Of course whenever you are taking estradiol there is always the opposing progesterone to consider, if you have a uterus.
However, if you want to try to come off it, I have read conflicting opinions about it. Some say you don't really need to wean yourself off it, others say you should. The bottom line seems to be that it doesn't matter how fast or how slow you come off it, if you are going to get symptoms you will get them regardless.
If I was going to try coming off it, I would first of all just try reducing my dose to see how I fared. I use a 50mcg patch so I would maybe cut a quarter off it to see how I went, and just continue to do that over a period of time. If my symptoms start to come back then I would know I'd be no better off stopping it altogether, but I might be able to get by with a lower dose.