Good article Chase, however this comment seems a bit off.

HaT has not been about "spamming" eviscerate since the multi-rogue HaT bug was eliminated long ago. Currently, given realistic CPs/sec rates, if you spammed eviscerate, you would average 1-3 CP eviscerates, which would yield terrible DPS. In reality, HaT has become much more interactive, where the player must constantly be making choices about what ability to use, including Hemo or other CP builders, balancing energy income (affected by varying CP levels of relentless strikes) with CP income (varying with the RNG of your party).

It is worth noting, though, that on wowmeteronline.com, there is a grand total of 1 HaT rogue in any top-10 rogue DPS ranking for any Ulduar boss (last I checked, at least). This seems to be primarily because Explosive shot is not generating CPs anymore, taking away the HaT rogue's bread and butter partner.

You're absolutely right that you should use HaT in suboptimal environments. However, there is a pretty strict logic that you need to follow to optimize your use of those CPs, and this logic does in fact include CP builders. Given the RNG of HaT, even with a great CP flow, you will find yourself at times in circumstances where a builder is essential to DPS, though infrequent.

Logic I use (keeping SnD up of course, and replace rupture with the Evisc when it's time):

If CP >4 Eviscerate
If Energy >90, CP > 2, Eviscerate
If Energy > 90, CP

EDIT: ...should NOT use in optimal...

EDIT 2: the comment system ate the second half of my post. Can't use less than or equals to operator.

If CP >4 Eviscerate
If Energy >90, CP > 2, Eviscerate
If Energy > 90, CP less than or equal to 2 Hemo
If Energy < 90, CP less than or equal to 4, wait

[lots of text was here]

Conclusion: dropping the third rule does in fact lead to a large DPS loss. Check Mavanas' sheet for confirmation, which lets you tweak the logic rules.

For those still interested, here is the link to the only HaT rogue in the top 10 for Ulduar:

http://www.wowmeteronline.com/combat/detail/85440504#damageout

He does 63 Eviscerates and 55 Hemos. Given that this is the highest recorded HaT parse on this site, it's fair to assume he had an above-average CP flow. Based on this, it seems that in even ideal circumstances, HaT requires a choice between Hemo and Evisc.