Non-SNP projections of a future Scotland are just that, projections. Not onto a blank wall. But onto what Alex SAlmond decrees.
Come 2016 things might shift which I am guessing is what non-SNP Yes people are hoping. personally I think this is unlikely.
I declare an interest first as a member of the latter camp.
However a 2016 Scottish Government elected by PR would be fairly representative by and large of what people in Scotland chose to vote for. A Westminster Government elected in 2015 by FPTP most unlikely to be so.
A lot of non-SNP folks like myself will find it infinitely easier to accept the idea of an SNP-majority (or minority) government in iScotland Holyrood that "we didn't vote for" on the basis that they are representative of the national vote and the party that we did vote for has a representation in the parliament commensurate with it's electoral vote, a voice in the parliament and is in a position to influence policy especially where there's a minority government requiring a coalition.
In the event of a No vote, I can vote for and campaign for the green party until my dotage and I'll stick my neck out and say I'm never going to see Scotland return 5% green MPs in a Westminster election. Or perhaps even 1. If nobody but me wants to vote green, then that's fine; it's a sign that either the party or the campaign is unlelectable and needs fixing. But if the party builds a small but consistent share of the vote across the country and never gains any electoral advances because of the manner in which the system operates, then that's not the state of electoral affairs that anyone's ever going to talk me into thinking is a good one.