Regards the Tacoma automatic transmissions, there was enough demand that Toyota has a software version they can flash into the controller to change the shift characteristics if you feel it's not crisp enough.
For 2nd gen: TSB-0373-09
For 3rd gen: TSB-0077-16
I don't know if this f/w is default for new production or if it's an optional fix such as the leaf spring upgrade used to be. On 2nd gen trucks you could ask the dealer to do TSB-0359-10, which was a fix if you thought the rear sagged too much. They would install up-rated springs with one leaf more than the stock packs. The ones they installed I understand were the OEM packs available as an option on commercial trucks in Canada and Mexico.
To the OP. The PRO is generally assumed to be not valuable in the sense that you can build up a plain SR5 into a PRO for less money on technical merits but you don't get the exclusive stickers and creature comforts. My $0.02 is that it's not worth the money since you can get better FOX shocks aftermarket (plus they'll be adjustable) that you can get rebuilt just about anywhere, an Air Locker and better skid plates cheaper but when you do those modifications you're not going to have a factory warranty on them.
I don't blame the fella who can afford a PRO and uses it like it's supposed to be used but wants to keep a bumper-to-bumper warranty. Not that Toyota is gonna honor it if you break something offroad, but we all know none of our truck ever have seen 4wd low, much less a trail, when talking to the service writer, right?