So, i was pretty stoked when I learned that steins;gate 23(b) was out as a precursor to steins;gate 0. However, I honestly didn't really get the change. It seemed he had given up on Kurisu, which was sad and disappointing. But more than that, it didn't really give me a lead to what S;G 0 was going to be about.
Dont get me wrong, I LOVE stein's gate, but half of it felt like a rerun and then diverged into a plot that was not fully explained as far as how it was supposed to transition. It didn't serve that purpose.
They kept the art original to the steins;gate series and so it was very reminiscent of it. Not much else to say in that regard.
Sound: 7/10 because it was still original to the steins;gate series but nothing new was added.
The reason why I felt this way is because in my experience reading the VN and watching the original S;G anime, Okarin just didn't act like himself. He wouldn't have given up after just one failure. His character changed but only because he was arbitrarily given this new quality inconsistent with the series.
They left at very little of a cliffhanger.
Same reasons as the enjoyment.