1. That's exactly my point, your gear and gemming isn't optimal if your pet is doing 50% damage, it means your damage as a hunter is too little compared to your pet. It's not like your pet is doing insanely more damage than with the arp build, it's the fact you are doing too little damage, which makes your pet seem to do more damage, but it's only %-wise.
2. So on marrowgar you just interrupt your steady shots and walk up to him to put an explosive trap down (while he's gonna lolstorm away from the explosive trap radius anyways)? On LDW you just walk up to her to put one down (even though she'll move away from it in phase 2)? On DBS, well, fair enough, explosive trap is good there. When you move in for stacks at Festergut, you can explosive trap, so it's good there. On Rotface it's useless. On BPC it's useless. BQL useless. On VDW it's bad 'cause you might accidentally hit CC'd aboms. On Sindy it's good 'cause of blistering. On LK it's pretty bad overall 'cause you have to move too much. The minibosses of RS don't really matter 'cause they're too easy, and on Halion it's obviously good (it was already good before they 'fixed' explosive trap, so now it's probably insane). Unless explosive trap is overbuffed since the fix, it's not worth moving all the way to the boss and back (some encounters this will wipe your raid anyways, so it's impossible to use). I haven't played since the 'fix', but if it's that important, that means it's probably broken. And I've been part of 30+ LoD's and Halions, but I guess that isn't high end content...
3. It wasn't worth it for me regemming all my gear and trying to use other items just for a BM run. BM is bad, no matter the gear/gems you use, the only thing good about BM is the 3% damage raid buff, but where's the fun in being 10th on dps charts while the rest just rapes you on the charts? Scumbag dps = best dps. (And no, don't tell me the 3% damage raid buff will change the outcome of an encounter, everyone doing LK/Halion has BiS gear and does WAY more healing and damage than people did on retail (all hail Paragon), people had TOGC gear when they did that ****... On top of that, you're losing so much dps compared to BM, that your raid-wide dps will be about the same when you play BM.)
Theory just seems to favor arp, even as BM, that's all I'm saying. Practice might be different, but that'd only be because a mechanic in BM is broken on mol10/10. But ayyy, I'm not a scientist.