I don't think Elder is as good as they were last year for sure. I mean, they were a regional semifinalist. That ain't nothing. This year in the GCL-S, X, Moeller, and Lasalle all brought a lot back while Elder really didn't. I still think Elder is at least better than Lasalle (they were absolutely the worst GCL-S team last year by a wide margin despite sharing the league title), and you never know how GCL-S league games are going to go with massive home court advantages and screwy low-scoring games. They may still be better than Moeller and X too as I think Elder is better in the backcourt than both those teams. I still see them winning at least 15 games. 16-6 or thereabouts and maybe the #4 seed in Cincinnati feels about right.
Regarding Elder's good players, you're exactly right. I think Murphy, Johnson, and Williams are those guys and that's it. However, I've seen really good teams have 2-3 players that can score and a rotating cast of 4-5 good athletes that can get after it defensively, set screens, and are self-aware enough to not shoot the ball. That could be Elder this year.