Well, first of all, change is inevitable and mostly good. Furthermore attempts at simplifying the User Interface such as Gnome 3, Unity to make Linux more inclusive hold much promise, even though they adversely affect my style of working.
Additionally, though now retired, I have worked with computers for 47 years, and though I do nothing serious for others now, I still do heavy duty things.
10.04 LTS is my big workstation, and I had three 10.10 systems for Mythtv, and one of which is further adapted for video & related. The Mythtv were 10.10 because of a dormant bug regarding installing to 10.04.
My work habits consistently use dual monitors, compiz cube and 3D windows with the computing horsepower to support them.
The dual monitors with separate X screens has been not been functional since 11.04, and cube/3D windows not functional in Unity, and with diminished functionality Gnome.
There is a bug filed (after upgrade to 12.04 amd64 Gnome Classic not properly draw second screen)
I have mitigated the situation some by switching to Xubuntu and eschewing Unity.
The question that comes to mind is why this bug is not given more attention in that it nearly cuts functionality in half for more competent workstations.
Sample Xubuntu 12.04 workspace...
Please know that I appreciate all the hard work and dedication required to pull off something as big as Ubuntu, et al.