I didn't get to critiquing the tech in the new mini series because I wasn't able to get past the glaring character flaws and plot issues. All in all, it was put together very badly, and wasn't worth watching. I personally think that the 1980 version was much better, even if you don't take into consideration the age of the original.
Missiles in space, believable, even in the vast future, though not particularly imaginative, and not as believable as something more advanced. Low tech networking on the ship: also believable, and very plausible given their explanation. lack of other more advanced tech is questionable at best.
Also something I didn't like: the whole lying thing about going to "Earth." The idea of roaming around the galaxy indefinately is simply stupid. Terrible plan. Better plan: egress from Cylon controlled space toward an area known to not be controlled by them and find a colonizable planet. Rebuild secretly and strike back. After all, one would have to be a complete idiot, certifiable IQ under 40 to actually think that this machine race that had built and planned and schemed for decades to wipe out the entire human race would actually let an entire fleet go without relentless pursuit. Also, the idea that they could indefinately avoid pursuit is ridiculous- the cylons would have found a way. I hate to say it, but their retreat would have to be more of a tactical withdrawal. Even the most pacifistic person would be a complete fool to think that war could be avoided. In fact, a person like that would be nothing but a liability, and would have to be eliminated from the decision making processes (the school teacher president).
I really disliked that whoe thing, and am dissappointed that they are actually making a series out of it. Also, I hated Starbuck. They original was annoying enough that they canned him in the middle of the series, and this one is ten times worse. Lose the bitch.