>1) its too godamn slow. I have 32 cores, 64 gigs of ram and a massive graphics card, yet draging windows about has lag, pressing the meta key has lag. Its just not fast like mate or lxde.
I am going to say this is probably only partly GNOME 3's fault. I have only lukewarm feelings about GNOME 3 but was blown away when I ran a distro on a very old Intel NUC only to see GNOME 3 running buttery smooth.
My guess for why is due to the high quality of the open source Intel graphics accelerator drivers on Linux. NVIDIA and AMD do not offer this at all, and at best performance can be tricky depending on what extensions and features your driver supports (and how well your card is supported if using open source drivers.)
Basically, I don't think GNOME 3 is bloated or slow. I think it uses relatively reasonable CPU, but compositing in Linux is complicated due to second-class graphics driver support, and that causes a lot of the lagginess/glitchiness/general wonkiness that you get with the desktop experience. (edit: An example is that I've had issues with resizing Windows that I have found to be NVIDIA-specific.)
(Of course, you can get around this by not using compositing at all, but I think the case for compositing is more than solid at this juncture.)