Hey there !
very fair comparison, i think you might have missed the lightning/shadow / particle portion of it.
I have been using this engine for a long time, and i have always loved how easy it is to code in EE, no headache.
I have spoken up a few times with what i thought would be great to add into the engine, develop a bit the module hard coded in the engine.
-Particle editor. unity does that fantastically and you can create some pretty sick looking particles and 3d particle effect, i personally been struggling to make anything look ok in EE and after that the game doesnt seems to be drawing the same way...
-water (water in general seems lacking)
-grass/tree specific swaying from the drawing technique, environment with pre-generated settings. it is good as it is, but not going deep enough ( weather, wind... ).
-UI in EE is hard to get right, difficult to master, and doesnt always look/feel great ( if you compare with how UE4 UI works ) would greatly benefits from more tutorial, especially panels
As you mentionned:
-cloth simulation ( any AA game title in first person would probably need that nowaday )
-IK support out of the boxes for bones ( any AA game title in first person would probably need that nowaday )
(and the big one)
-exposed shader with some tutorial ?
(i feel some people might not use this engine because of how the shader looks like out of the box)
but at the end of the day, i think one of the main reason why people use unity/UE is because of the store items and code snippet, which is out of your control.
but i would say that having the code source of the few prototype you made on the EE market place released for free would be a pretty nice step in that direction. might bring a few more people if they can see what is possible and how it is written.