Will pcos hormonal imbalances end after surgical removal of uterus, ovaries/tubes?

Well yes, but...: If the ovaries are removed, then you'll no longer be producing much female sex hormone at all, and you'd then essentially enter menopause unless hormones are replaced in pill form. Daily hormone replacement pills keep levels very stable which would generally end the sorts of symptoms you get from abnormal hormone fluctuation in PCOS. Though it's far too aggressive of a treatment just for PCOS.