I have pushed updates for EFL 1.7.7 and Enlightenment 0.17.3 which was released few days ago in the developer mailing list onto my SlackHacks repository. Everything works fine here, so i guess it would be safe to upgrade to this version.
I have also upgraded connman to 0.14 and also switched econnman to git version. One note about econnman package is that this package is linked to icu4c-49 library, while Slackware-Current already moved to icu4c-51. So i added an ugly hack to create a symlink to make it work. Let me know if you have a better idea.
Enjoy Enlightenment 0.17.3 and EFL 1.7.7 and please report any problems using my SlackBuilds :)