I might have missed this - is this "3000" number something significant, or did you just make it up?

Eh, the higher your Spellpower, the higher the value of crit and haste, so at some very high value of SP, +1 crit will be better then +1 SP; what exactly that number is, I'll leave up to people better at math then me.\

As for the crit softcap (100% under 2t8 lunar), as many have said before, it only effects Lunar so it should have less of a DPS inpact on it's stat value then the haste-cap.

Hey Im wondering if there are any spreadsheets available for balance druids for the current patch with the eclipse chance and ToC gear etc

In regards to refreshing dots; and [spend time during Eclipse] or [spend time potentially used to proc another Eclipse]:
I have a suggestion may help alleviate this decision under specific circumstances. It does not explicitly answer this question, rather details a situation whereby both are minimised. It is important to note that this situation may not occur often, and is only relevant if you choose not to refresh DoTs towards the end of Eclipse.

Basically the aim is to maximise usage of "uncertainty" in proccing eclipse.

For Lunar, this is the flight period of a critical Wrath. [We know it'll be a crit, we just don't know if the crit will proc Eclipse]
For Solar, this is the moment in which we queue our next spell. [We don't know whether the starfire will crit until it hits the target a split second later - in which our next spell should already be queued]

When attempting to proc Lunar Eclipse:
-Do not starfall, as that obscures when you can see when a Wrath will crit (and therefore a chance for Lunar Eclipse to occur)

When you see that Wrath will crit: (You may want to fire two wraths before you go to the next step, depending on your distance from the boss; and you've likely to have queued up another anyway)
- Refresh dots that have fallen off. (You'll probably have space for two dots; although this will depend on your distance from the boss and how many wraths you chained)
If Lunar Eclipse is triggered, begin Starfires.

Rationale: This is very similar to an Eclipsing strategy whereby you charge a Starfire cast after you notice a couple of wrath crits (in order to maximise Eclipsed SF uptime); It's just replacing the pre-starfire with any dots that might not yet be up.
In a philosophical sense, if you're replacing your pre-starfire casting for this strat, you are just trading Eclipse time at the beginning for dots; in which case you would be in a similar situation as if you had refreshed your dots whilst Eclipse was about to end. [Difficult to make sense of? Read a few times :P]


When attempting to proc Solar Eclipse:
If the direct Lunar->Solar Eclipse did not work on occasion; you could try:
- Refreshing the DoT(s) after 1 Starfire (ie, queue your dot)
Note that if SF crits, you will gain Nature's Grace, likely lowering the GCD to 1s. This will probably affect both your dots AND your first wrath cast.

Rationale: By the time you know if the SF crits (therefore triggering Solar Eclipse) you will already be casting your next spell. Execution time for instants is less than cast time for SF, therefore 'wasting less' of the Eclipse (unless you casted two dots, in which case it would be more debatable).
If you had dotted before the SF was cast, that's extra time used with 0% chance of proccing eclipse (although you trade-off for guaranteed DoT damage)

I'm uncertain whether it's worth doing [SF -> Dot -> SF -> Dot] or [SF -> Dot -> Dot] if the SF did not proc eclipse. I'm leaning towards the latter whether the SF crits or not (unless of course, your dots happen to expire in a manner which would suit the first sequence)


But what if my Wraths don't crit?
Eclipse-wise, you're in exactly the same boat as if you had applied dots earlier. However, you're now missing out damage from dots.