I'd say if it gets her hunting, she's practiced A LOT, has the knowledge of vitals and can keep her cool to take a high-percentage shot while on the ground, her setup is SUPER tuned, and the heads are sharp, then do it...
I would, however, recommend a good piece of cover, or better yet, a ground blind, to allow her to concentrate on getting to full draw, and getting her form in place to make the shot, so she doesn't have to worry quite as much about getting busted at ultra-close range.
Moving your body millimeters to make that draw can take a lot out of you, and your concentration for the shot, while you're in the deer's "sixth sense" zone, and they can sense any movement just barely outside their vision cone.
In a nutshell, anything to boost her confidence during the final shot sequence (and accuracy) can help to offset a light setup.
And I'd also recommend the two-blade around 400 grains of arrow, maybe a hair more. Any more than that will drop really quick...and tuning is the most important part...heavy doesn't work if it's wobbling on the way there...
Just my thoughts,
Marc