I'm all for the empowerment of women. The issue I have with this is not whether there are female Predators or not rather than female Predators looking like female humans body-wise. It just seems so generic that if there are Predator sexes that they would resemble and coincide with human sexes and gender profiles. It makes the Predator seem very terrestrial, relatable and human rather than extraterrestrial, un-relatable and alien.
I always subscribed to the idea of all Predators as asexual hermafrodites throughout most of their lives, i.e. they're neither men or women, that once or twice during their lifetimes enter hormonal cycles that make them susceptible to propagation.
If they decide to go with visually different looking Predator males and females I would rather have the females look like the males but with different skin patterns and maybe different dreadlock colors and/or different shaped head ridges/crests/spikes. Maybe establish that some of the predators that we have seen so far have been female without us even knowing it. Maybe City Hunter was a female for example?
If we necessarily have to go with Predators with human gender profiles and distinguishable sexes I would be ok with subtle curves and anatomical androgyny. Predators are clearly not mammal (they look pretty "reptilian", they don't have nipples or bellybuttons, and their lipless tusked mouths clearly suggest that they're not meant to be breastfed) which means that there is NO need for boobs.
From a comercial standpoint I can definitely see the appeal in having chesty heroine bodied female Predators to open up the franchise for girls/women, whom will find this overly macho and brawny franchise more interesting and appealing with some bad-ass female representation and femininity tossed in there, as well as an element for the geeks to oogle and get "excited" about...