By the looks of it, the new system made changes both ways. Before if the storygame was a 2.51 it would round up to a 3. And if it was a 3.49, it rounded down to a 3 also. To the average person it appeared they had the same reception, but in reality their ratings might be quite different. With that said, I think it was a good change to the rating system because it entirely removes that discrepancy.
Just a random thought: to save you time, and since 3J is actively updating the site, it might be worth adding an auto-unpublish feature of lowly scored games that happens with the nightly update that impacts orders, trophies and such. After maybe 7 or 10 days, if a game is under 2.50 then it'll get unpublished automatically. That should give enough time for its rating to stabilize and let people get some comments on what the author should improve on. Maybe even add an automated message sent to that user, saying it was unpublished for being rated too lowly, but also adding a list of tips based on common mistakes to advise them on how to work towards at least a 3 or 4 rating.
Entirely deleting a game, if someone keeps republishing it with no changes, would still be a manual admin action. Much more optionally: there could also be a hidden variable/flag that could be activated on the backend, that would allow a storygame under 2.5 to not automatically get unpublished by this system. I'm not sure why there would need to be an exception, but having that option in place would counteract any odd what-if situations where it could be a problem. Anyway, not sure how much work this would be to add, but long-term the feature might be helpful in site management if there's periods when not a lot of admins are active (like it was for a while last year).