Well said @bigcol
Yes the "Playdoh" I believe has been kept to the 2.5T limit by Toyota on purpose... Keep up the sales of the higher priced big brother! But you never know they might just change that soon to compete with the ever increasing 3.0 - 3.5T capacity vehicles coming out now!
My take I don't really think toyota keep the Playdoe to 2.5 for any other reason that they are consertive and sensible? Really the way the new breed of dual cabs are being rated is a worry. The izuzu which in chassis is hardly much more than our old rodeo with 1.8 t tow capacity had been rated to 3t then over one model year marketing decided to change nothing but make it 3.5t yeah right. Personally I think the entire crop of DC utes are asking for trouble towing to near there max. Well suited to the 2-2.5t most on this forum are towing. Imo you can't beat having the weight on your tug and evenly distrubted for towing and that's why the cruisers, Patrols, Pajeros etc do it well, even the gutless 3l still tows safely.