Since I don't live in Scotland, I don't really know much of what the media portrays there. However, my experience of politics is that *
every* party, and people of every persuasion almost invariably believe that the media is biased against them and in favour of their opponents. So unless there is some solid reason to think that things are different in this case, I'd take any claim of bias with a strong pinch of salt.
I'd be especially sceptical of any claim that the BBC is anti-independence since all my experience South of the border is that here the BBC reports the independence debate reasonably impartially, giving a similar coverage to voices on both sides of the debate.
I think you're misrepresenting the argument against FOM. There's some truth in what you say, to the extent that the fact that FOM was actually used by such a small proportion of the population does have some weighting in any judgement about how valuable it is. However, the core argument against FOM is that it came with huge disadvantages: It was great for the people who wanted to move abroad, but pretty crap for all the people who were unable to find somewhere decent to live or get adequate healthcare services etc. in their home towns because FOM had caused significant population increases in their locality without there being time to plan for adequate corresponding infrastructure improvements. Generally speaking, if you're pitting the right to have somewhere to live against the right to roam the World, I'd say the right to have somewhere to live is just a tad more important