Personally I think given our limitations what we've done so far is pretty amazing in and of itself. This new game may look nice and all, but its still just an arcade game with set characters and more of the same from budokai tenkaichi series gameplay. While looking at other games does help with seeing how they did such and such thing, we tend to like doing our own thing and try to be more original with ideas. Our main resource for reference is indeed the anime/manga though(more-so toward the anime).
For what little resources the hl1 engine has given us, our character models and stuff look pretty accurate compared to most other sources, as well as maps/enviroments. I also believe our gameplay, being unique in of itself, is prob as close to the feel of dbz combat as you could probably get in terms of a game. We've given players way more freedom to be able to do things a lot closer to the anime than any of the console games have, but i doubt anyone could ever get a game to be 100% accurate with the source. DBZ is far too chaotic to do right and make gameplay balance out, the end result would be a terrible game thats so unbalanced no one would want to play it.
Either way, thank you for posting about this game, I dont believe ive seen this one before, so was nice to look at.