I am not yet menopausal but when I am I don't plan to take a continuous progestogen. 
I will do long cycle like Sheila, 2 weeks every 6-8 weeks. For me this may be with a progestin, which are more effective in terms of endometrial protection than micronised progesterone. 
Long cycle sequential gets you as close as possible to the health benefits and quality of life enjoyed by those on estrogen only, which obviously you cannot do unless hysterectomised.
However the NHS doesn't support this. It is something you would have to take ownership of yourself, and I would strongly recommend paying for a scan every year or 2 years to ensure endometrial control, which is what I will be doing. 
Also because I have banked decades of endometrial protection on the combined pill, my personal risk of endometrial cancer is lower than average. 
Regarding the presyncope, which is something I truly empathise with and is horrible, as I live with severe dysautonomia, are you aware of the hypotensive and salt wasting effects of micronised progesterone? 
A non-diuretic progestin can be much better in this regard. I am on the combined pill to prevent me releasing my own progesterone. 
Oral estrogen also helps support your blood pressure, whereas transdermal does not, and testosterone also helps with this (although you would have to tell the NHS it's for libido - they care far more about you putting out than passing out).