I don't buy it... I don't buy the fact that Paramount wouldn't ask the question early on in the process. Especially considering Nimoy's then feelings towards acting in general and Star Trek in particular, because its' their money on the line.
Someone talked to Nimoy fairly early in the process I don't care what they say on the DVD.
You've never worked in an environment where complex organization, creativity and tight deadlines keep you hectic and busy, where you have to juggle 16 things at once.
I can tell this by this very response.
Bank Operations Manager for 12 years, I can't imagine a much more hectic environment... was responsible for 30 employees and a five hundred million dollar nightly deadline.
You don't forget the basics of your craft when things get hectic.
YOU don't. I don't. I've worked in Software Development for 12 years, before moving on to second-level technical support for a set of APIs. I can personally attest to situations where oversites occur.
In either case, we have insufficient information about othser scripts (whether alternate ideas existed), or whether they would have had the time to alter the existing story in a way that worked without Spock given whatever schedule they had at that time.