[@Savo]
As others pointed out, the levelling system doesn't even matter. Hell, Jabbers didn't even point out his levelling system, he just mentioned skills and skill points or something along those lines. So, very possibly, Jabbers could have had a levelling system that was similar if not the same as the levelling system in this.

What I'm trying to say is if you try and find all the negatives, you won't see this for what it is - a decent chance at reviving the old interest check. Unless Jabbers comes back, which is unlikely, this is all we really have left. At least give it a chance!