I only really have a couple of gripes about my D22 (ZD30)
It is seriously short on torque until you get it up to around 1500 rpm and get some boost happening (Which is a PITA when towing) I have not driven a YD25 powered one to compare. But with the ZD30, uphill starts when towing feel like a toss up between the combo starting to move off and the clutch giving up. In some situations where I can stop after the climb I put it in low range to make sure I will not have a problem.
The rear seat space is really a luggage space, otherwise good for young kids and amputees.
The front seats and the driving position are OK, but not great.
The ride is strangely miss matched front to rear, the rear shows the 1 tonner heritage and the front is marshmallow soft so over undulations you get the rear suspension trying to compress your spine and then a moment later the front trying to make you seasick as it dumps down onto the stops. Not a nice feeling.
I have been thinking on if I keep mine or sell it to lease a D40 for work (The ride would put me off selling the D22 to the lease company and leasing it back instead of getting a new D40) If I kept it under a lease I would have to spend a couple of grand on it first I reckon, some good front seats, retrimmed to match the car or retrim the rear seat to match the new front ones and some trick springs and torsion bars to improve the ride and the front to rear balance.
I think it is a good ute for the money paid, but there are plenty of things I would have set up differently.