WMC on Win7 will carry on working fine for as long as you run Win7, and just because support is 'ending' doesn't mean Win7 will stop working. There are still about 600m Win7 PC's running in the world. The only reason to stop using WMC on Win7 for LiveTV is when MS kill the guide updates. Very reluctantly, I actually gave up on WMC 18 months or so ago, but as I have no interest in Win10, I eventually just bought a Shield for Emby, and it works brilliantly. No more hassle maintaining Windows, or tweaking settings. I actually just watch things now, and don't worry about it. I also just use a basic DVR for recordings, but because so much is streamed now, I find I'm using that less and less.
So, if it's still working for you, just stick with what you've got until something better comes along that's not Windows!