Mate, I get you don't like the guy and/or don't think he is good enough. It is coming across as purely a wind up at this point. (I'm going to give you the benefit of the doubt)
Soldado is a proven striker, outscored in Spain only by Messi/Ronaldo. Personally I see a striker that moves well, has a very good cross on him, doesn't panic (see the penalties), good finisher (see Spain, see his one "open" goal where he looks up and picks spot) and has very good work ethic.
Again, I think the comparison to Bent/Hernandez is unfair, neither of those guys contribute **** to the team other than goals, if you don't believe that Soldado contributed more than that in the last 3 games, then not sure I can help. If you want a comparison, I think right now (I believe it will change), Torres is probably best example, working hard for Cheat$ki, being involved, setting up goals, but not really scoring himself.
My view is next season Ade/JD will be gone and Soldado will still be here.