First of all, congratulations on enhancing your orgasm via the G-spot vibrator, & for taking things into your own hands, so to speak. :)
Basically, the cold hard truth about menopause is that your reproductive body is done with you. It no longer serves any evolutionary purpose for you to enjoy sex in order to reproduce. However, don't buy in to the gloom & doom about lack of pleasure after menopause.
And re orgasm intensity being permanent or not after menopause, every body is different. There's no telling. But you sound empowered & pro-active.
One thing I will say, is that with age, we develop more emotionally; as our body slows down, we develop in other areas. If you're in a relationship, enhancing the connection between you, and looking into each other's eyes at the moment of orgasm can increase the emotional & erotic intensity.
I hope this helps. :)
Claudia Six, PhD
Clinical Sexologist & Relationship Therapist