It seems to me the defib is only really useful if you're carrying it when you die... And I'm a horrible first aid kit hoarder (but then my brother and I are really selfish with our first aid kits xD), since I hate dying and I like healing myself as soon as things are going south, so the idea of not being able to carry both a defib unit AND a med kit is not very reassuring to me. xD I think we've used the paddles... maybe once?
Okay, is it just me, or does Normal seem more like Advanced when it comes to difficulty? My bro and I were playing The Parish campaign and I SWEAR, it took FIVE TRIES to beat it and he's still the only one who made it out alive, and even then only barely (something like five health left, no pills, no adrenaline, no first aid, everyone else already dead and hordes of infected spamming the helicopter). And we play on Advanced most of the time in L4D. This game is RIDICULOUS. The hordes DON'T STOP SPAWNING. I would hate this game if I didn't love it so much.