Week the only way he uses it is as a shield, to mimic super strength and such, and to attempt flight which he hasn't perfected. What are the concerns about similarities? 

Other options would be solid light projection, think green Lantern minus the ring and not as powerful. Limitations would be added. 

What about pocket dimensions? He can create doorways to pocket dimensions. So he could theoretically have a shot gun in his pants pocket. As long as he has a frame to work with he can access the space. So a doorway, the opening of a backpack, etc. I could give you a list of items he has and how he acquired them and track what he uses. Also could add to it as we go in story.