One thing, and you may not have encountered it yet. How does the game perform with lots of action/enemies on screen? MoC was pretty laggy in my experience and it somewhat detracted from an otherwise pretty fun experience.
I haven't noticed anything major, and nothing has detracted from my enjoyment of the game at all. The graphics, while a lot better than previous Ys games, are still not anything too impressive when compared to most modern games. Very simple models and the aliasing on the polygons is pretty bad. It is a Vita game too, so you might want to wait for the PS4 version if you're worried about frame rate and resolution. Me, I actually wanted the PS4 version, but couldn't wait till next year to play it, so got the Vita version for now. I'll consider whether or not to get the PS4 version as well when it comes out.
I want cfw for my PSTV so I can play PSP ISOs. I'd gladly buy a second one for that, keeping my current one updated for Vita games.
I had a regular Vita and a Japanese Vita TV. I'm keeping the Vita TV on lower firmware so I can use the whitelist hack. What I did in order to play Ys VIII on my TV is buy a U.S. PSTV. They are dirt cheap. So, now I own a total of three Vitas in all.

Strange since I only own like 10 games.
I found it meh, didn't really find anything I liked, but there it goes for others to check out.
To be honest, I am starting to feel a bit "meh" about the soundtrack now as well. It's nice, but I haven't heard any tracks yet that stylistically really scream "Ys!!!" to me. VI and Seven did a better job trying to emulate the trademark Ys sound... though I felt like VI almost tried too hard at times... almost to the point of sounding like a parody of Ys music (though it is still a very good soundtrack). Seven struck a pretty good balance between sounding both old and new to me. I'd really like to hear some more "Ys worship" in the VII soundtrack, and am still hoping it will be present in some of the later tracks I haven't heard yet.