Whilst back press is a great idea. This makes no sense as a standalone project. Really core itself should look to back press itself. Wordpress desperately needs to be modularized. Wp core should choose a release (say 4.6) and as part of that release make itself properly modular and stick to being modular for all future releases. However if that doesn't happen there is no point trying to to do this as the backpress guys will constantly have to play catch up.