To be honest, I'm not sure. Yes it's alpha/proof of concept but seems pretty stable and some use it already. But it also means it didn't get any love since then.
I don't think there can happen much as it just creates pages with a image on it. So even you could go and do it without/remove ImagesManager. The parsing part for image tags could also be replaced or handled differently. It's all not things that can break easily or go competly wrong you wouldn't be able to fix somehow.