Being there on day 1 has no value at all...
There's plenty of value. Information is harder to find, less consistent, confused by misinterpretation, and surrounded by misinformation. But whatever, you can play the game blind anytime.
More importantly, in a month or so, the game will be saturated with experienced players. As white phantoms, they will be able to walk you through the levels too easily. As invaders, they will be more highly optimized, better geared, and have superior tactical knowledge. Since the game is designed for player interaction, if you play off-line you are missing a key part of the experience, so playing offline isn't an acceptable solution to the problem of a quickly maturing player base.
Before then, you get to enjoy the mass of community confusion, experimentation, and developing characters. That opportunity has a very limited shelf life. Take it or leave it as you like. BTW, many who will be playing on PC will be buying on PS3/360 first and then buying again on PC...so while Day 1 on PC will afford the same hysteria to a degree, there will still be a lot of experts running around on PC Day 1.