Use what you've already got or buy the right gear for the job.
It makes no sense to change clothes during the race unnecessarily unless you specifically want to.
If you're not happy with what you've already got, get tri shorts and a separate top.

First of all hats off to your lady friends... I tried that since right before my ride I had to pee. It just wasn't happening.

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I still lapped everyone on the couch!

I'll be the first to admit, I have to pull it waaaay up.

I did IMMT as my first full last year and wore a kiwami spider ld aero and had no issues. I plan on wearing the same thing this year. I am nowhere near a kona qualifier so a bathroom stop wont make or break my day. My main thought with picking the suit was being comfortable in it all day.

So, it does make sense........

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Pink? Maybe. Maybe not. You decide.

This is exactly why I want to make sure what I am wearing works well because I have other things to worry about on race day. Why add to the list before even hitting the start line?

I guess my point is it doesn't make much difference, anything works well. I've done 17 IMs and other than the one where it was cold and raining, I've never second guessed what I wore. Your going to get different opinions because of personal preference but if you find something you like and train in it a little, it will be a non-issue.

Cowboy hat for the run is a must! You look like a badass and are shielded from the sun on your head.

There are other toilet stops that aren't helped by pulling your short leg up!

Sun protection and heat management is no small thing to me either - also racing in Australia. I use a one-piece with an aero cycling jersey over the top. Works fine under a wetsuit and the sleeves + longer legs eliminate sunburn on shoulders/thighs. Plus, the jersey is apparently faster too....
Can take the jersey off while running if I feel hot/claustrophobic - but it is almost weightless and has a front zip so its pretty cool to run in.
Never unzip to pee - just lift the leg. Quick & simple.

Almost 20 years in the sport and I've never had to make one of those stops. I'm lucky enough that I can always take care of that in the morning.