I only have good comments about the compositor.
At first, I was pretty disoriented, as I, too, come from an After Effects background. The compositor uses a procedural workflow instead of layer. In other words, it resembles a lot the Render Tree.
In the beginning you feel limited, but the more you get accustomed the more you find it powerful.
The con is that information about the capabilities of the compositor are somewhat limited, the docs and the tutorials do not push it to its full potential.
Hope this helps
Salutations - Cheers
Bernard Lebel