Lots of guys out there running trutracs with tires larger than 32"
Plenty of guys in the hotrod world running into the 10 second 1/4mi, too...they are stronger than just about any stock, open carrier from any manufacturer, and are definitely stronger than lunchbox lockers in the vast majority axles out there.
That stipulation is more of a "CYA" statement in the owner's manual. It is strong enough to handle larger tires, assuming your axle itself is up to the task. Heck, just about ANY aftermarket carrier has a stipulation in the warranty that it is void in an altered vehicle, or one with tires larger than manufacturer spec.
That being said,
I've got one in my 14bolt 9.5" SF axle in my Chevy.
Sounds like we have the same goals...weekend warrior that will also see a LOT of time on twisty pavement and gravel roads. For this, it works GREAT.
IF you find yourself trying to rock crawl, you'll probably hate it...but it works well in mud and snow and has excellent street manners. I've had to do the parking brake trick a few times with my rig...but after tapping the brakes I managed to get along just as though I was LOCKED.
I wheeled my rig with a factory locker (which engaged 1/2 the time, and disengaged after 25mps), until it blew up...then ran peg-leg for a while (open). The Trutrac is definitely an improvement over being open, but if you have a very capable rig...or ever plan to do more than 10-15trips a year for true wheeling, you'll want to go selectable like an ARB.
If you want to see what it's like to wheel a trutrac, hit up Youtube...lots of videos of people testing them out. You can see how they react, how they slip and lock up, etc. to get an idea if it is right for you.
FWIW, I once watched a Jeep JK with trutracs front and rear teeter-totter on its front left and right rear tire. After a few seconds of aggravation he remembered to light apply the brakes. A locked rig would have crawled right past where he was without flinching.