If women want an equal role in tango, keeping their eyes open and participating in good floor craft is the first step.
Part of me wonders if "equality" in the dance is often a synonym for "doing whatever I want".
On the topic of height, I have to say on average I found the native Argentine dancers to be quite short and I'm only 5'10". Yes there a few tall ones, but many were on the bottom range of my easy embrace. A tall visitor does not have much option but to hold out for the lanky few unless he has learned some height-compensating skills.
Statistics are on my side, Argentines are typically an inch shorter than Brits.
If an 8-foot man can be comfortable dancing with a 4-woot woman, more power to them both! After all, the dance is about internal beauty as much as external appearances.