Pax, this just seems so difficult to believe and I am sure you are sick to no end to have your fears realized. I am sure that your attorney will come up with some way to challenge this and to point out the flaws in the analysis. I have been watching continuing legal education seminars on valuing businesses all day today and the analyst says over and over that there is a mechanical way to do these things but there there is also some art to it in terms of how these numbers are applied and where. You may want to talk to your attorney about whether having a valuator, rather than a basic CPA, take a look at this result and see if there is a way to attack it. Doing so should be cheaper--it is always easier to look for flaws in a document than it is to draft it. If there were any bad assumptions used in setting up the analysis, that alone will poison the result.
I'm sorry that you keep getting the short end here. I am just not aware of any jurisdiction where community property can be used to maintained by funds earned during a marriage and constitute separate property.
If he ends up with a disproportionate share of property (in my state even separate property), I would think that would cut against any claim he could make to spousal support (obviously his need for such support is lower). It may turn out that by "winning" one pot of resources, that he leaves himself vulnerable to another.
I know it isn't easy, but try not to borrow too much trouble until you have a chance to talk to your attorney about the effect of this, what you can do to challenge it, and how it impacts the other moving parts of the property disposition.