The secret to getting good overall organization and symmetry might be the approach taken by these two guys:

http://fleen.org

https://www.pinterest.com/pin/282037995384211853/

(For that second guy, see his earlier stuff. His butterfly origami. It's stronger

Which is to say, rather than building a large system from cells, they start with a large simple system and then differentiate it. Recursively.

Now how that might be applied to your vision is a question