Fleegle

Too many functions, meaning...?
Not flexible, meaning?
Plugins: it's been stated several times already, plugins' support is not 100% there yet.
Editing an existing mask, no success: again, what's the issue? Editing masks can indeed feels different from what people is used to. That said, there are other similar posts on this very forum already solved. It only takes a minute to understand how it works, then it's a matter of habit. The more you use it, the better you get (as for everything, right?).
Not intuitive. You should expand on this topic because it really opens a can of worms. What is intuitive for you, could be totally counter-intuitive for someone else. Also, what you find intuitive could be only your habit to something you are used to, which surely took some time to get used to. So, perhaps, your definition of intuitive is better interpreted as "X doesn't work as Y", which is not the meaning of intuitive.
 
I agree with PaulAffinity: it's the era of the apps. Which is totally fine, no one forces anyone to use one particular program. But then, people should also be either more descriptive about the issues they find, or more honest and admit they are not willing to give up on their habits. But that has nothing to do with a program being ready for new users.
 
Perhaps I went through too many programs to know that a learning curve is always needed. That learning curve, though, is what gives me new ways to explore things I take for granted. If I want to stay in the comfort zone, why wander in other territories in the first place?