Sorry, don't think so. The problem with healers is that you aren't sitting there chaincasting your biggest heals over and over like you do with DPS. So, the benefits of Spell Speed are far from clear. Crit heals, apart from crit aldo, usually overheal reducing their benefit and making it hard to compare. Because of that, I don't think many people have bothered calculating stat weights for them. I mean, without knowing the exact numbers, I'd expect WHM to want PIE > DET > SS = CRIT because more mana is good for them, SS is only of marginal benefit since you should be pre-casting your heals anyway, but crit makes you overheal to no effect almost always when it triggers. Better to have a consistent increase than a random one for WHM. For SCH though, because of Aetherflow and crit aldo, it's more like CRIT > DET > PIE > SS. You can do that analysis without having numbers, so the numbers aren't as meaningful.
For tanks, what do you compare? Enmity per second? Damage? How do you factor in DPSing while keeping up debuffs that don't increase your DPS, like Rage of Halone or Storm's Path? Are you talking in or out of tanking stance? What about tanks who drop tanking stance regularly when no tank busters are coming? How do you factor in choosing to use active mitigation instead of damage/enmity? You need to establish a baseline to compare, but that baseline isn't going to mean a thing in many situations.
EDIT: Also, the questions you actually asked in the OP about the specific formulas are answered out there somewhere. I've seen them before, but that was pre-3.0, so I don't know how things changed, but the new formulas are out there somewhere. They have to be if people have stat weights calculated. Dervy's site has some.
I just looked up a few, but couldn't find maths for heals. A few useful things: Each point of Skill Speed increases your DoT DPS by about half as much as a point of DET. 600 DET is about a 7.5%-8% increase in damage, where 700 would be closer to 8.75%-10%. The Crit formula has been calculated to be: crit chance = ((CRT-354)/(858*5))+0.05 (multiply that by 100 to get a percent). The crit damage buff formula is the same thing, but add 1.4 (140%) to the result (so, crit damage = ((CRT-354)/(858*5))+1.45)
Is that the sort of thing you wanted?