Yeah, I only really play Scout, they're really versatile, and actually get a pretty hefty selection of lethal weapons to choose from, I mean, not non-lethal, all I have so far is the Wu-pistol and the Tranq sniper rifle, which is nearly useless because of how difficult it is to aim, in fact, I'm just generally terrible with sniping, but at least the MD-2000 can take some classes out with one bodyshot, you need two shots from the Nagant to temporarily knock someone out, and they will be woken up by their buddies.
Also, about you complaining that infiltrators are squishy, jesus christ, you should see how bad Fulton +3 and stealth camo equipped Infiltrator can be, I've seen two of them take out three, one of which being an enforcer, I know how squishy they are, hell, I can take one out in one burst from my G-44, but all they need is to judo throw you once in clear sky and bam, you're fultoned with a ballon that takes the better half of a magazine to destroy, those types need to be that squishy.
I've always thought of traps like the plushies or claymores as area denial stuff more than anything, they're too easy to spot, apart from the fulton cannon, which is BULLSHIT because it can take about 6 shots by which point it's already fultoned you.