Somehow Skype is working flawlessly for me... I'm always connected ( Well, there is no way you can log off from Skype in Beta once you installed on your phone) at work and home on wifi and data while driving... In fact it integrates pretty well with my car bluetooth system. I get the skype call as a regular phone call on my car speakers... Moreover, I'm not having any battery issues as the latest beta doesn't integrate the skype contacts with phone contacts which was the cause for earlier complaints of battery drain.
I understand that it is still in beta, but it is so far working flawlessly for me... Yes many features need to be added on it. Let's hope that the final version is deeply integrated as MS promised last year. The moment it happens I'm gonna get rid of whatsapp..