OS X Yosemite bugs? Glitches? Connectivity/ performance problems.

So yes OS X Yosemite! Yay is out! But wait... what?! Yes, I have been having glitches and problems ever since I started to upgrade to Yosemite. First, I noticed that my laptop just dies randomly then I suddenly see that "Your computer has restarted due to a problem... bla blahhh" then I press any key then it leads to the ever amazing Apple logo then it loads with that loading, slow progressing bar then GLITCH!! Apple logo everywhere on the black screen, white line and the loading status bar goes on the right lower corner and carries on to load to the log in menu. Everything works well from that then it dies from time to time again and to note this had never happened when I was on Mavericks. Second, exciting update Yosemite! Very well polished BUT why am I having connectivity issues with bluetooth? Magic Mouse connects and keeps disconnecting. First few hours with Yosemite it was working fine then suddenly it kept disconnecting and when it connects the tracking motion is very laggy even after visiting the mouse preferences on the System Preferences. Restar = no avail. Shutdown for 30 minutes = no avail. Replace mouse batter = no avail. Check bluetooth on system report still Bluetooth LE. Turn bluetooth on and off like a gazillion times nope. Third, continuity/handoff no work why it no work? It no work! Okay, it really doesn't wanna connect despite the endless tries and efforts I have made it still doesn't work and I have the latest OS X and Bluetooth LE, iPhone 6 running iOS 8.0.2 everything is on. My rant/problem is done? Has anyone found a solution for this? Did someone do something and it worked? Share it to me!! Please! пожалуйста! ください！I'm literally begging in three languages that's how I desperate I am for answeruuu! Thanks you! спасибо Большое ! ありがとう!!

Btw running OSX Yosemite (10.10) Retina, 13-inch, Late 2012

MacBook Pro with Retina display, OS X Yosemite (10.10),