Thank you AndreasOlan, yep, you're right, the main app start freezes are still there, as annoying as ever!
The right click freeze was not an issue anymore, so if it's officially fixed by the update that's great, but I had it fixed a while ago by removing some items from the right click menu and with some registry tinkering, I don't recall exactly what I did, but it's documented, even here on this thread. Anyways, it's great that there's an official fix, on a new windows install we won't have to do entry level engineering work to have a half alright desktop experience.
The micro freezes when starting browsers (both for firefox and chrome) (that are set to run on the dedicated gpu) are still there though. I'm pretty sure it's happening for some other programs too but I ain't gonna test it any further, I'm sick of it.
So it's TrayPwrD3 and staying plugged in and ignoring that in 2018 I'm using a laptop that is struggling with things that my 80s hc had no issues with. goddammit..
My next laptop is gonna have a single video card, I'm not playing around with optimus and switchables. And all the reviewers of the world that knew about it and said nothing, I hope they all go out of business.
Anyways, it's not the end of the world, but it's annoying.
Next I'll try the newly released intel driver - http://members.iinet.net.au/~michaeldd/Intel%20HD%20&%20Iris%20Graphics%20Drivers%20Version%2023.20.16.4973%20WHQL.rar , see if it makes any difference, unless it breaks my laptop - (these y720s have a return from sleep issue with most versions of intel video drivers..).
Will get back with feedback regarding the intel driver.