There was a fantastic individual on Google+ that mentioned removing the secured connection to make Chromecast support 1080p+ streams like before! However, I agree, this needs to be somewhat of a selection choice. I have to now DISABLE SSL in order to have the Chromecast stream properly. I would prefer secure connections across the board and then have Chromecast NOT have the SSL if it struggles.
In case it matters for anyone else looking, I have not been able to get a stream at 8Mbps 1080p to work at all, only dropping to 4Mbps 720p worked or lower. I usually had zero issue on any device or computer, meaning only the Chromecast was struggling with 1080p. Of course, I blamed it on the Chromecast, even though 1080p YouTube and more worked fine.
This change has rectified the problem and Chromecast is the super streamer it used to be again!