I'm not trying to piss you off or give you a hard time. Nothing I say here will change your mind. I know how you feel, this was my experience with the original Commando after the M090 update.
If you are the original owner of the phone and it is on the original line it was purchased for why in God's name don't you warranty it? It's less than a year old so there is little reason to endure these issues. In all likelyhood your replacement will still be on Ice Cream Sandwich. You would just need to root and freeze the update program and that would be the end of that.
I'm not seeing any of these problems that you complain of. Until recently, the Droid Razr Maxx was the end all be all, and I had one for over a year. From my point of view this phone works as well or not better than the DRM did on JB. That being said, JB was not a good OS for the DRM, but I digress...
Have you done anything to evaluate why the poor battery life? What app is keeping your phone from sleeping. What action causes the Wi-Fi to fail?
I work in agriculture & I'm a firefighter. Both jobs involve water, dirt, potential for drops & hits, and lots of grease. I have no concerns about it's durability, and unlke my DRM, I carry the phone with me always.
I'd warranty it. Having those kinds of problems is bullshit.