Don't worry about it!
I was just wondering about their setting; I love your concepts and ideas, so if ice was to become lightning, I'd want the tribe to look like your concepts as much as possible!
I stated this before, but I just remembered it this morning:
From what I've gathered, most of you at TTV essentially want four elements/toa- Tahu, Gali, Lewa, and Onua, representing Fire, Water, Air, and Earth, respectively.
However, you also said you wanted six rhakshi.
Something, literally, doesn't add up.
When Lego makes themes, and, therefore, the characters in those themes, they tend to make both sides equal, unless, of course, they are making swarm enemies.
An example would include Chima:
Other themes may have swarm enemies, yes. Ninjago had much Spooky Scary Skeletons, and Bionicle G1 itself had Bohrok. However these examples still had four and six versions of bad-guys, respectively, as an adversary to the main heroes.
What I'm essentially stating here is simple- if you're going to cut Pohatu and Kopaka, then you can wave goodbye to these fellows: