I've been doing some testing with Touch of Death and found that it has been significantly nerfed compared to live.
You trigger touch of death and get a normal attack, including any offhand/doublestrikes, and the touch of death damage is added to all hits that are part of that attack animation.
You trigger touch of death and get a single attack (no offhand or doublestrike procs at all) and touch of death damage gets added to that attack.
This means that when you use touch of death, you no longer get multiple touch of death damage procs, and on top of that, you don't even get your normal offhand or doublestrike attacks. For some high-end DPS monks, using touch of death may even be a net decrease in damage for that attack animation. For a Tier 5 enhancement requiring an entire line of enhancements to unlock, as well as 50 Ki to use, this seems very harsh. I am hoping this is a bug and not intended.
As a note, this same behavior also applies to the Elemental Word attacks and the Tier 2 Elemental Ki Strikes (Fists of Iron seems especially stupid with this behavior, since there's no way I'd give up my offhand attack and doublestrike just for +3[W] and +1 Crit multiplier and range). This may also apply to other attacks, such as Void Strike or the Shintao strikes, but I have not had time to test those. The elemental attacks attached to the stances seem to work as before with no change.
I have bug reported this, but thought I would mention it here as well in case it is not a bug.