Well IMO acct. wide BoAs aren't that bad, and I'm not linked either (and don't plan on doing it). Assuming it works the same as mounts, it'll be nice to not have to grind BoAs out again every time you make a new toon. Even toons that you have capped out on honor ect. will be able to buy boas for other classes, just like p2p.
This however introduces a new possibility for f2p as far as bgs go. Before, playing leveling battlegrounds was kind of a wasted effort, since you couldn't possibly save up enough honor to have decent gear before hitting 20. If this goes forward f2p will be able to jump into xp-on bgs at lvl 10 with a full set of boas. It'll be interesting to see if this will offer enough of a comparative advantage to draw some people away from playing 20s.