Is the main issue with Codex: Tyranids that it is under-powered, or is it that too many other codexes are OVER-powered?
Hello again! Having the Friday off as well I thought I'd finish my musings on this topic today rather than wait for next week. I ended the first part with the question above, and while the first part went into some glaring (albeit fixable) errors in the codex design, I feel that the answer lies more in the latter part of the question than the former.
Balancing a game as complex as Warhammer 40k is an extremely hard process, compounded by the rate of codex releases and other additions/supplements such as Escalation and Stronghold Assault. Not to say it is impossible, but I think the community as a whole can agree that, regardless of your opinion on Games Workshop, they could be doing much more to provide more balance.
It's not to say that they don't make any effort, as FAQs are released from time to time to address wording and ambiguity issues, however I think (and in light of the less-than-stellar financials, which you can read about at Faeit 212 and many other blogs) that a bit more focus in this area would be hugely beneficial to their end-game, i.e. building a healthy, growing, profitable community.

