First of all, I am not against any new technology of any kind, so don't consider this as a rant of some sort.
Now developing with new technology is difficult most of the time and as you stated Gnome3 is still very new. From what I could see from the new Gnome desktop is almost feels like our Mint we are used to and love.
Almost is now a twitchy thing. I went to Mint because the desktop felt as close to what many people already know from M$ desktops as possible and I like it a lot.
What I cannot see to get familiar with is when desktops tend to "know better" what people consider important information or not and I remember it the reason for me to switch very quickly from ubuntu to kubuntu a few years back.
The first reason was that I liked the blue KDE3 theme more then the orange / brown-ish color theme and it was closer to what I was used to from Win95 - Win7 today.
Anyhow for reasons we learnt in school for human machine interaction is that in a perfect world the user sits in front of his/her screen and looks down at an approximate angle of 10-20° down on his / her screen and interacts with it.
For physical reasons the human eye has a larger angle of sight downwards than upwards and thats the reason M$ made their "task-bar" at the bottom of the screen.
Changing it to the top of the screen is just a nightmare to look at but Gnome is doing that since the first release for reasons I can not comprehend.
KDE on the other hand wanted to give users the best user experince and as close to what M$ was doing as possible but this is not about KDE.
For many years I am following the development of Mint and loved you for doing exactly what I am proposing today with the taskbar at the bottom of the screen and the Mint menu on the bottom left and anything else important to keep an eye on on the bottom right corner. I don't see any reason to change that.
At least for me I would have a hard time to train myself not to open the recycle bin to open programs and having to look for Minu menu since it left its default place.