I wound up swapping to mighty swap when I started running more dungeons, now I have gotten used to having quickness every 15s and on demand knockdowns from my wolves. I miss uber wolf, but the rapid swaps really help melt mobs quickly as I can dump a good chunk of my skills in those 2s.
I had a panther at 25 stacks through all of AC and CM all six paths. Except boss fights. In boss fights, one quick turn or a missed recall, and suddenly I have lost the entire stack. I have started swapping traits on boss fights for the might on swap, and do a power swap as soon as cd on pet swapping is up. Red Moa plus Jungle panther is pretty strong for buffing and group benefit. The quickness is pretty crappy unless you are in melee range. Otherwise it's over before your pet ever gets to the guy you are fightng.
The part that frustrates me the most is beastmaster builds make the most sense in dungeons. SB requires flanking to be optimum which is tough to pull off in a lot of zones, and LB requires 1000 feet or more to be at it's best which again is pretty tough to pull off at least 50 percent of the time. So BM should be effective if you can micro manage your pets. Mighty Swap plus Sword auto plus Jungle panther = 10-15 stacks of might on your pet in seconds.