At this time I'm uncertain if this is intended or a bug but currently it is possible to fight Lockmaw independent of Augh for the most part by actually fighting him inside the building behind him. By tanking Lockmaw in the doorway, preferably with his tail sticking out, you can expose the flanks of the boss for dps while also channeling all of the smaller crocs through the confined doorway. Additionally once Lockmaw is defeated if you remain in the building, Augh does not engage immediately allowing you to fully replenish inbetween. Naturally you would still choose to fight Augh outside giving you more room to avoid his whirlwind.
Since this building was placed very convenently there for this encounter I'm not surprised that it may be intended to be used in this manner to make the encounter easier. I think it may be there as more than a decoration and intended to be used, however, like I said I have no idea what Blizzard's true intentions were. For example, is the fight just that much easier simply because we did it the "right" way? I don't know.
"In anything, if you want to go from just a beginner to a pro, you need a montage." /w TankSpot WTB Montage for Raiders.