It did, but soul and atmosphere are two different things IMHO. There might be less (or at least, a different) atmosphere at Fir Park now than there was 25 years ago, but it still has much the same soul… otherwise folk wouldn't be complaining about leaving it behind for a "soulless" new build.
Only analogy I can think of at this time of night is the difference between weather and climate I suppose -- weather/atmosphere is what you have at any given moment, climate/soul is what you have over a longer period of time, and to some extent defines a place and the people who inhabit it.