Kripparrian, you bring up some good points, a couple of which I have comments on. Note that I'm not trying to pick a fight. You brought up issues I hadn't thought of previously and I just want to insert some further points.
When doing the 10.5 second versus 10 second rotation, I don't think you emphasized enough that this depends on haste procs. With no haste on gear, Steady is ~1.7 cast speed. That extra .2 sec adds .8 seconds, filling in the 1 second of nothing you mention and leaving only a .2 second gap, and that is not considering any latency. That really muddles the rest of what you said about that, because anyone who does CS, AS, SSx4 will only have 1 second of nothing if they have a haste proc up. I have power auras displaying my improved AotH and I can attest to it not being up 100%. So, you'd really want to alternate depending on haste procs and not just default to one or the other. If you set the spreadsheet "wait time" to less than .5 seconds, you can get this rotation as a result. When haste proc is up, the rotation test uses 5 steadys, and overall DPS is increased.
Another thing I'd like to comment on is adds in a fight and how they affect Kill Shot glyph. You said it lessens the value, but I disagree. It should be that it varies. In a one add example, it lessens the value (obviously it doesn't change the amount of KS you do). In a multiple add example, such as Deathwhisper, you can often use Kill Shot on adds more often than you normally would due to different adds all over the room being at different HP levels.
I'd also like to note that earlier in this thread I created an example that favored Chimera Shot but showed Kill Shot being, at the very least, equal. I gave Kill Shot 45 seconds out of a 300 second fight. That's 15% of the fight, showing that the 20% to 0% phase is faster. Over 300 seconds, the Chimera Glyph grants 3.3 extra Chimeras. Over 45 seconds, the KS glyph grants 2 extra Kill Shots. In a single target fight, you really should only compare number of Kill Shots gained versus number of Chimeras gained, and 2 versus 3.3 is pretty close to even considering the CS glyph requires perfect rotations the entire fight to get full benefit while KS glyph requires it for only the last 45 seconds to get its full benefit.
Also, using Readiness doesn't decrease the value of Kill Shot, imo. As I just said, you should compare how many shots you gain with the glyph. Even if you reset it with readiness, the amount of shots gained does not change (or is unlikely to). If the glyph is going to allow me to get off 2 extra Kill Shots, then resetting it will only move the cooldown forward by 1.5 seconds, which is more likely than not going to leave the resulting ADDITIONAL Kill Shots added by the glyph the same. They become a smaller percentage of the total Kill Shots, but 5 instead of 3 is two more just the same that 6 instead of 4 is two more.