We don't have nearly enough HoT-focused spells making up our healing composition to out-weigh Haste's increased mana expenditure. Since I have not put together a detailed explanation yet (except the video in the OP), you can browse the old WoD stat weights on the "About" tab. That's what the link is there for. Obviously, some parts of the Haste explanation will not apply, like WoD Mana Tea channel speed, but the basic concepts still apply. In short, if you have a finite supply of Mana, all Haste does is let you use more TP/BOK or SooM, and nothing else, the latter of which is what you see in the spreadsheet, and for sure not a large HPS gain, being the weakest spell of our entire kit. Calculating SotC value and Haste weights is a high priority for me for this reason.
Versatility is stronger than Crit in practical situations because of diminishing returns. The result of Vers>Crit does not surprise me in the slightest, nor should it surprise anyone familiar with the WoD weights (Vers and Crit used to be pretty close, but now we don't have Crit propped up by proccing extra mana tea stacks).
The rating-to-stat% conversion rates are on the Truths tab, including for Lv110 on the side.
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RT is definitely out of date from before the TP-BOK interaction change. Perhaps I should add a note of that for now.
I will double-check FT while I'm at it and get back to you. Focused Thunder looks correct. You get one additional use compared to normal.
However, perhaps this will clear some things up:
In the first term of the whole thing
((60/Truths!$F$11) + 10*(Main!$J$15*Truths!$F$63*Truths!$F$64) - (60/Truths!$F$10))
This is saying
"RSK casts from cooldowns + RSK casts from BOK resets - TFT casts you would have gotten if you weren't resetting it every 9-10 seconds"
This is then multiplied by the gain of additional TFT casts (since each RSK cast yields a TFT cast).
The second term (starting with a minus sign) is the number of RSK uses multiplied by the HPS lost from additional Mana expenditure, since you're required to spend this mana to reap the HPS benefits.