It's not only affects Samsung TVs but all TVs brands as well.

So I don't think it is fair to call out Samsung on this as they most likely don't have a say in this. This is all on MS and I'm sure for good reason, as more and more people are using Skype on tablets and mobile phones as it is much more convenient and mobile.

See this article of why the change:
http://mspoweruser.com/microsoft-ending-skype-tv-support-june-2016/

I hope this helps.
Cheers,
-Lee