I'm far from an accomplished artist.
I used to use Gimp to enhance photographs I took and printed for family and friends only.
My daughter asked me to make a logo and that's when I started to use Gimp for "painting".
The design has been changed a zillion times so far.
This was mostly on Gimp-2.6.x.
I installed Gimp-2.7 in the /opt directory (folder) and could run them both if I wanted to.
One big problem I encountered was plugins like for scanning and printing in /opt.
So I made a second Gentoo install on a separate partition with Gimp-2.7 and deleted the install in /opt.
I now have 2.7.5 from the Gentoo repository on my regular install and 2.6.12 on my separate partition (just in case).
Alas there is very little in the way of documentation so I'm just experimenting with it to find out how things work.
And I must say it's overwhelming.
The mile-long list of brush dynamics I found a way of finding out what they all do.
Choose one and click on the "Edit" icon you'll get a greyed out window which shows what's ticked so you have an idea
what it will do.(You might need a magnifying glass,I do)
No script or plugin in 2.6 that can do what these make possible AFAIK.
One thing I noticed that I hope will be solved:pen pressure doesn't work as well as in 2.6.
All in all it's a big step forward.
Edit: Just saw this after running Gimp_2.7 from a terminal
(gimp-2.7:12659): Gimp-Base-WARNING **: 2 tile managers leaked
unref tile manager 0x52f10c0 (552 x 368)
unref tile manager 0x52a35c0 (552 x 368)
That's not funny it's a memory leak.