What should be the influence? Battlefield 3. Modern Warfare. Halo. Killzone. Iron Man. Starcraft. DARPA. My Little Pony. Think modern tactics, modern weapons. Not the Hollywood Tactics of the IG nor the fifty three episodes to throw one punch of Japan.
I think you could take any one of those and mark it down as something I wouldn't want to see. Maybe Starcraft or Halo. 40k is not Modern Warfare. It is barely even Science Fiction. I think contemporary military elements drawn from console shooters are far and away the
least appropriate influence to emphasize.
And I am sorry, but I can't see the term "weeaboo" used without becoming somewhat annoyed. It was originally a trollish backlash against kids who though anything associated with Japan was cool. Mostly a response to the popularity of kids anime and a few product lines. But I see it as
just as juvenile and far more mean-spirited. I don't know what your intention was when using it, but that is how I interpret it. I don't know what a "weeaboo" influence is, let alone how it applies to the Tau in 40k.
The "eastern" influence in the original Tau book is
mostly visual. You can't really say that it is inspired by Manga or Anime, because that is like saying that something is inspired by comic books or tv shows. If you know anything at all about Manga or Anime as they actually exist in Japanese popular culture, you find yourself hard-pressed to identify many common elements (although what gets exported is more similar). Tau are not inspired by anime and never have been. But there were certainly a lot of visual cues from eastern
history in the original Tau models and background, from the use of circular symbols to the shape of the armor panels. I think that should continue and be played up. 40k models all need a consistent theme, and the Tau models work best with an orderly but rounded scheme. In terms of background writing, you can find as many influences from Chinese history as you can from Japanese history. Kids tend to latch on to Japanese history or anime as an inspiration (for good or ill) only because they are more familiar with it.
What I don't want to see is another transition like Tau to Tau:Empire. I do not believe that the Tau are anything close to fine as they are now. The army needs to be brought up to 5th Edition. Adding a few new alien allies isn't going to cut it. The Tau represent a significant challenge to balance. No matter how good you make an army in close combat, close combat itself offers opportunities for both players to fight. An army that is
too good at shooting will be frustrating to play against. That was why the last Imperial Guard book was so poor. So I don't think the Tau should push very far out that way. And I think the "empty battlefield" tactics of JSJ and deep-striking suits are probably not as much fun as they could be, either. I would rather see an army that is good at close-to-mid range shooting and
resistant to close combat without much ability to use close combat to actually cause damage.
The original Tau book had a strong constrast between its line troops and its elite troops. I have seen the comparison made to
ashigaru and samurai, or to peasant spearmen and knights. Not as they were, but as popular culture romanticizes them. It doesn't really matter. But it is not a modern sort of army structure. The Battlesuits are too important, and they have no equivalent in modern warfare.