What is the motivation for changing up the suspension? If its 80-90% street time, what type of tracking is the other 10-20%? Does this other percentage require rapid spring changes and involve uneven road conditions? Are there rules limitations about what can or can't be done?

While coil overs are a very compact way to have easy access to height adjustments, varied spring rates, rapid spring changes, and lighter weight, that's about where the benefits stop. I have no detailed info on the Transformers unit, but it looks massive.

Similarly, IRS are a neat way to maximize tire contact patches but are rarely every fully utilized to their full capability in most cases and in some high powered applications, are actually a liability for broken parts, depending on the power levels you planning.