I think it looks fantastic, doesn't deviate too dramatically from the original formula that made arsenal great but adds just enough to improve on the base. Can't wait to try it out.
Havent seen the vid yet cus im out but i think it was great as a beta because it served its purpose perfectly and now rolve knows what we want. But as a game it wasnt very good, it did have some really good additions though like the special weapons but they missed very badly with the gunplay and movement on release.
One reason why I feel good playing of Sundown is probably because of the sky-box not being the sandy one (OG Sandtown fans, anyone?). Same thing for Matrix.