I think most people that are going to decide to stay here are likely decent at character building, at the very least. This is more of a powergamer server than a RP server, so if that is not of interest to someone, they are likely not going to stick around whether there are builds provided for them or not.
I agree with TwinHaelix, with special emphasis
on extraordinarily useful
The problem with the Content Library regarding information is that there is enough of it that is either lacking, or incorrect, so that one really cannot trust to any particular thing being correct. And 'incorrect' is 10 times worse than lacking, because the whole reason to document something is so people do not feel the need to ask questions about it, thereby creating not a desire to know the unknown but a false assurance of what you think you know, but not really
More helpful than newbie builds, in my opinion, would be if maybe there was a post for each class, skill, feat-type, and spells by level maybe, with veterans of the server posting significant rule changes regarding those classes that have not been documented (or are incredibly difficult documentations to find). I spent about a month going through the Content Library making notes on everything that had been changed from the core rules. But I learned more in about 5 minutes just listening to random chat over the Shout channel (things like the range for Mass Cure spells having been changed to affect all party members wherever they are, as long as they are on the same map, and 100 - Survival skill being the percent chance you will be interrupted while resting). Things like that are so different from the core rules that no one would ever know to have reason to even ask about such things and, therefore, ideally should be available to be learned from the beginning.
In other words, rather than providing a solid build (Giving a man a fish), provide the knowledge required for people to make better builds for themselves (Teaching a man to fish). Of the six builds I have worked on here, five were completely incapacitated by lack of documentation and the last merely severely compromised, so this is definitely an interest of mine