I now have Unity 2D running on my laptop, and the jury is still out as to whether or not I keep it or go back to Gnome.
One thing that is throwing me off is that I don't have the same notification icons in the top panel that I like to have.
One is a CPU monitor. My laptop is a little older, so I keep an eye on the CPU usage to know when one process is done and I can start a new one without slowing things down.
The other is UIM. I switch between Japanese and English input, and the UIM indicator applet in Gnome let me know which input mode I was in.
Right now, only my Dropbox icon has carried over (I upgraded from 10.10).
How do I add/remove indicators in my top panel? Right clicking seems to do nothing.