No, NO, and No. Remember that the Zentradie unit have to fit a certen combat application. You can't just be giving them unit for the sake of giving them units. What you should be doing is looking at what the masters see the Zentradei as ans then basing there
Mecha on that.
Case in point I have always seen the zentradi as more of the space marines in warhammer 40k. They would do everything in the name of the masters and so on. If you went with that basic concept alone then you would be getting rid of basic battle pods and officer pods all together.
Your for at that point would be more "power armor" driven with would make sence to when the Zentrandi are 10 times the size of a normal human. The would be a force more of "power grunts" andYour "battle pods" and "Officer pods" that would be used in the story would have greater perpose. They would be more along the lines of a dreadnout or what not.
But going bat to what you guys are asking about transformable no. That would just be to high of a tech to begin with and skill level that would take would be beyond that of a basic Zentradi force.