Can't even access other user's profile anymore and the send button doesn't work either without leaving the conversation and then returning to it, etc.
Maybe some flakiness is due to iOS 8DP, but certainly not the missing functionality.
So maybe v5.5 will be ready for prime time.
On the OS X side, everything past the v2.8.x releases of Skype has been an unmitigated disaster. I still run the old version for as long as I can, but since m$ took over Skype the old version...