There is an extablished axiom about 4-Wheel Drive that is regarded as being established, accepted, and self-evidently true: "all it does is allow to get stuck in more inaccessible places"..
AMEN.

@Flei - I have a 2006 2350, and drive it regularly as a 'video shoot support vehicle' towing a box trailer.
Indeed adding a bunch of suspension improvements will improve the ride and handling. I found addressing the root cause of the handling was the key:
The front springs are too dang strong for the vehicle. The factory would have to re-certify the entire setup to change them from factory, and that would be WAY too much $$$$.
So to make it so the alignment can even be put to spec, special camber bushings are required. These ARE permitted to be added.
To address the root cause, I had the front springs changed out to a set that were made 2" lower, and 10% softer. WOW. What a difference. RonD did similar with some 'off the shelf' springs.
The first good sign was that the special camber bushings had to be swapped out for the stock. This means that we are closer to what the engineers intended.

What a difference. Without upgrading the front sway bar, adding a rear sway bar, and/or adding expensive shocks, it rides totally different. SO nice.
I can be loaded, with trailer, fighting a seabreeze as I head down the coastal highways and steer simply with one hand. Trucks passing in either direction cause no distress.
With the front end in proper geometry, it works like it should without a bunch of band aids.
So maybe consider springs first, then additional parts added after as needed. You might be pleasantly surprised.
I modified my macerator to have the 'bayonet' mounting and QD's on the wiring so it isnt on there all the time... as we use the 'stinky slinky' 99% of the time. BUT.. having said that, the macerator has been the 'Ace in the Hole' a few times when leaving festivals at odd hours, with tanks full. Macerator + Port-O-Lets = empty tanks going home.

So it gets carried along for 'those' times.
RE: cab creaks and separation... I went through and rebuilt mine, and it is TIGHT. Went from sounding like an old ship at sea to 'squeak free'. Little out of the scope of most owners, but very rewarding.
Good to read about your 2350. I could not be happier with ours. Full body paint is in the works... cant wait!!