I had considered this rotation before initially posting, but it runs into two main issues that made me decide against it. First let's compare how much extra damage you receive from complete uptime of HT/Disembowel vs. the slightly lower uptime of my own rotation, it's always best to consider potency and I'll use your notation to keep things simple.
Mine:
HFP IDC TTT
170-110/132-187/132-198-242-193/220-181-242-363
HFP TTT IDC
187-121/132-205/132-181-242-363-217-242-193/220
HFP TTT TTT
187-121/132-205/132-181-242-363-181-242-363
The Heavy Thrust buff falls off prior to its reapplication, as does the Disembowel prior to its own, which has been accounted for in the potency numbers. You also have to add on an extra two moves (so 29 moves total) for coming back to the beginning of the rotation as the initial Heavy Thrust and Fracture are now buffed by Disembowel, so +187-121/132 . Now the same treatment for yours:
Yours:
IDC H TTT P TTT H
180-220-176/200-187-181-242-363-205/132-181-242-363-205
IDC P TTT H TTT P
217-266-193/220-205/132-181-242-363-205-181-242-363-205/132
And then +217-266-193/220-205 for coming back to the start as these moves are now buffed by the end of the previous rotation (so 28 moves total). In total potency per second mine produces 109.1 potency/s (7594/69.6s) and yours produces 111.9 (7525/67.2).
So the potency is extremely close. This resolves our first issue, which is that you don't actually obtain any more damage by sacrificing Fracture for increased buff uptime. You could argue for increased autoattack damage in the very brief downtime of the buffs, but I doubt this would account for much extra damage.
The second issue is that the first rotation benefits from (1) boss downtime (such as moving out of AE) since you have more DoT damage ticking (MORE DOTS), and (2) it gets significantly better as we acquire more skill speed. As you remarked, the second rotation gets worse with added skill speed (which is inevitable given the future of the game), and since there are only two DoTs being applied instead of three, it starts falling behind as soon as you spend any time away from whatever you are hitting.
However, it deeply warms my heart to see people taking the dragoon moveset and trying to optimize it in ways I may not have thought of. I've been really pleased by how this thread has progressed (compared to say the "lol who is best dps" thread) and I've referred back to everyone's comments continually for useful information. So thank you all, let's keep doing the job that we love (no matter where we might fall on some unknown parse) and optimizing it in every way that we can!