Decided to keep the Wrangler and change the things that were making me unhappy with it.
First up is getting rid of the really heavy wheels and muddies. I like polished wheels on Wranglers and the Wildpeak MT01s are awesome, but at 40kg each, they were ruining the drive.
I picked up 5 stock 17" wheels from @Nanook during the week - cheers! - and then went hunting for some ATs in 265/70R17. I'm partial to Wildpeaks but the best price I could get locally was $280 each. I found someone selling them in Sydney for $180 each - absolute ripper of a price, definitely worth the 5 hr round trip.
Overall, downsizing has made the JKU much nicer to drive, and it's not much but I'm also saving a couple L/100km.
Attached pics of before and after.