I actually like the new Skype very much, but the spam issue needs to be solved!
There are many fake accounts, no way to merge different Microsoft IDs, etc.
I have to agree that Microsoft by not having its full attention on Skype ruined a huge potential! It allowed many messengers to bloom when it was basically a monopoly.
Honestly, there's very little that needs to be done to make Skype better and I'm not sure why Microsoft cares less about it!