The real problem, for me, is that it is all a leap in the dark. Rather than have a preliminary set of proposals of how the two countries would operate, there has deliberately been nothing. So there is absolutely nothing on which Scottish voters can possibly make an informed decision. This is highly political chicanery from the SNP, because, as we have seen, so long as they say something will be the case, any negative response can be greeted with "See, they're oppressing us". Until there are some negotiated details, it is impossible to say whether or not Scotland would be viable.
This is deliberate, and may be designed to favour the Yes vote. Intelligent Scots may well see there is not enough to base a vote on, and just not be able to bring themselves to vote. Smaller turnout, tending to favour the zealots.
Of course, post-vote, there is no way that the SNP can guarantee the outcome of negotiations on any matter. Negotiations tend to involve give and take, but Scotland, whether becoming independent or not, has little to give, not least because of commitments given as part of the campaign.