It's not about that making it easier, it's about lasting longer in the battlefield without having to constantly die and respawn. I'm thinking respawning in this game is going to be much more of a big deal, the devs haven't even yet explained how the fluff works for that, but that they had long discussions with GW about what would make sense with the IP. I'm guessing a respawn equates into you essentially playing as a new soldier, who just so happens to exactly match your previous soldier's equipment, skills and name. Anyway, no need to get mad about this, not yet at least, so far this is all just speculation. I thought it was weird at first to have a shield bar in THQ's Space Marine, but it actually made the game more enjoyable, which is ultimately what matters.