Just got done watching/listening to 14:11 of youtube Xbow talk. I would agree with him on 90% of topics. It does bring some versatility and fun but, this is only in the OMA (One Man Army) realm. I've played with this weapon scoped/unscoped in a variety of situations and I've found that when in team play you can drastically hinder your ability to advance/hold objectives. As support you still keep ammo packs, engineer you still get your torch, Assault you still get the paddles of wellness, Recon you still get your alert the enemy spawn beacon. However its the extra items that the Xbow replaces that I feel can really hinder your team in a crunch. Sometimes that medic pac, TUGSSOFLAM, or Stingerjaveliniglasmawrpgv2 alphabet soup can really help your team stay in the fight against some pretty crazy odds. If I'm playing alone personally I'm all about the Xbow. It allows for almost another PWS (primary weapon system) and still fill the fundamental role of the class. Plus its awesome to combine with a suppressed 1911 to help keep things quite. In team play however unless we're dominating as is, I would rather have something that's going to contribute to the cause. PTO'ing.
What I've found as far as the bolts go: The scan bolt is only really good for a few blips then dies off. The HE bolt while good for harassing vehicles and infantry really doesn't do a whole lot. However every time you take out a chopper you'll giggle like a school girl. That makes it worth it alone. The balance and standard bolt are good 1 shot kills if played right.
In the end it offers options. I don't think this was meant to be a game changer just something to help the OMA guys out a bit. At the end of the day team work & PTO'ing will conquer.