I love the way the armor is currently designed in the game.
I tend to utilize shock tactics in tactical and strategic games ( Hannibal versus the Romans: )
http://en.wikipedia.org/wiki/HannibalOwens versus Uller ( which almost always starts at the beginning of the game ) is all about maneuverability versus Uller's arming and legging. Novacat B - sniper-arming or sniper-legging. Madcat Beatstick: arming or headshots. And my latest experiment: Uziel twin light gauss for sniper-arming.
When I'm in a combat support role I'm either SRM / MRM ing or performing battlefield amputations using the above.
The only mech that I think might have a problem is the Osiris series, which has fragile legs - a BA can use a micro heavy laser, followed by SRMs and basically 2-shot the Osiris. I sometimes see people using the Osiris but I don't think that it makes a good battlefield mech.
I was playing a 1v1 gladiatorial arena style versus Mechman. I had an Owens B and he had an Osiris. My Owens lost and Mechman mentioned that the Osiris' strength lies in it's ability to 360 torso twist, which is why it beats an owens in a 1v1 duel.
I've played Battle Tech a couple of times and a new player would notice that the weak armor in the back torso makes it vulnerable so I asked the teacher the question, "Why would they design a game mechanic like that? People have been using plate armor since medieval times ( which protects both the back and front torso ). And this is a futuristic game so it seemed like a non-sequitur:
http://en.wikipedia.org/wiki/Plate_mailHe replied something like, "the engine is located there and it generates an interesting game mechanic where, in order to protect your back torso, you have to do torso twisting, circling manouvres". My face looked like this:

To which he said something like, "Don't worry, you'll see as we play".
( If you had all of the armor that you wanted in your legs, arms, head, front and back torso, you wouldn't have Mechwarrior, you'd basically have TankWars 2020
