Hi, I've played with chaos dwarf since 3 ed. (with this I don't want to say I'm a guru of chaos dwarves, I only want to say that this tactic works) and always have a player with blunderbuss (star player or not), and he is allways a Dwarf.
First of all because I haven't so much happy whith the idea of make a conversion of a hobboglin (all my team are conversions of warhammer miniatures, with the exception of Hthark, and I'm tired). Second because the background: the hobgoblins are slaves of chaos dwarf and it's obvious that the dwarf wouldn't give an expensive weapon to a slave.
It's dificult to a dwarf to pick up the ball, OK you are right, but it's my last action of the turn. Then I'm shure that if I miss the action, it doesn't matter because it's my last action. Then you can think the other team can come and pick the ball instead of my dwarf, but you must think in the Chaos dwarf blockers and in the bull centaurs, they are very hard defence.
The other question is who will catch the ball?
Obviously every body think in a hobgoblin (although a bullcentaur manages to catch one time to make the Victory TD, but this is another history). The tactic I'm used to play is "green slick" (i'm not shure that it's correct, is "Marea Verde" in spanish) well I explain it: I try to have as many hobgolins as I can in opponent's touchdown zone and then ... roulette (they arrive there like the oil on water, they sneak in). It's the tactic on the paper, on the pitch only one or two hobgoblins manage to arrive in oponent's TD zone.
A second part of the tactic is my Hobgoblin "captain": "Pass it to Me" (My avatar is a pic of him, if you watch him you understand quickly second part of the tactic). When I deploy my team the opponent see my blunderbuss

(... the miniature of chaos dawrf) and "Pass it to Me". I'm sure he see him because I pick him and I say something like this: "This is captain of my team "Pass it to Me", and the dwarf over there has a Blunderbuss ...". Whith this the opponent forget the other hobgoblins since my "captain" is KO

. This give the chance to all other hobgoblins to arrive at the TD zone

. When the opponent realizes what is happen or it's too late or him/her manages to block all hobgoblins, but then he forget "Pass it to Me", and he can try to took a good position to do a TD

.
It uses to work, but not allways. If it doesn't work you only have one way ... pain, lots of it.
This is all my knowedelge of Blunderbuss. I hope all of this help you.
Kaín