I think it's miles better than the first, but much worse than the second one.I enjoyed wonder woman so much more than the two captain America movies I watched. By a huge margin.
To me, WW is just a run to the mills movie that fells into the bell curve that contains most of the mcu.
I dont think the superhero movies hás anything to learn from it, besides that women can be protagonists of a successful movie (that goes for Marvel specifically though).