I've been wanting to add my flats to my male ensemble... I think it would actually work surprisingly well.
I wear flats and mary-janes in male mode all the time. A funny look now and then, but nothing negative. I've seen the baggy-jean-underwear-showing look get more stares.
The crossdressing community is one that needs to stick together and continue to be there for each other for whatever one needs. We are always trying to improve the forum to better serve the crossdresser in all of us.