Varlock, the developer of the popular Ghost hosting bot, has done a successful concept test on this functionality and will work on implementing it for public use in the future. The technology is portable for Garena (or anything else in theory, if someone wants to port it) as well.
He wanted me to try to help him gauge interest level for his project. It would basically require the host to be using the tool on bnet, garena or any other hosting platform the feature is ported to. Any player that wants to be able to reconnect would have the custom reconnect tool running, but players who are not using the tool could still play in the same games.
The exact time and schedule for its release is not defined yet. The main reason for this post is to help get him feedback so he can decide how much interest people have in it and consider his schedule accordingly. If you have any thoughts you want to share with him, you can respond here and I'll relay them to him or you can email him directly at firstname.lastname@example.org
Thanks to Varlock for his continued efforts in the DotA hosting scene.