Kotaku released a video in response to playing the closed beta for PlayStation All-Stars Battle Royale, and it mentions that the beta doesn't have urgency.
Directly comparing it to Super Smash Brothers, Kotaku said that the lack of bottomless pits in PSASBR doesn't give it the dramatic urgency that SSB has in each of its matches. This point can be countered by the fact that each level has some way to get damaged by the field itself. Still, having multiple contingencies to contend with would make the games themselves that much more invigorating.
PlayStation All-Stars Battle Royale is, of course, still in beta form, and feedback is how things get improved. Let us know here or in our forums what you think of the beta, if you've played it, or what you think about PSASBR not having that "urgency element."