Definitely a different direction from that of the Argo jeep.
Yup, at least it seems to have a pressurized cabin to deal with environments like vacuum or those that have air that isn't breathable, a very practical design decision IMO.
What is the advantage of duals over one very wide tire here?
Redundancy incase one set of wheels gets punctured, that's about the only advantage I can think of.
It would suck if your mission failed because of a flat tire.
Today, we can't do really wide ones because rubber doesn't work quite that way, and OTOH we don't want to overdo it because having covered oil barrels for wheels gives inferior rather than superior grip; inline is the better way to reduce surface pressure. But Trek materials could take the punishment and also bend in ways that improve grip.
Actually, Semi-Trucks have the option to go Super Wide instead of Dualies.
https://www.bauerbuilt.com/bauer-built-blog/dual-vs-super-wide-singles/
It's pretty common, especially in the EU.
Long wheelbase with little fwd/aft overhang is good for stability in many kinds of terrain, but there seems to be little in the way of ground clearance. Praying-mantis arms instead of straight booms might work better. Especially if one wants to stow away those fwd wheels somehow, for reduced footprint.
The front arms really do seem to support the vehicles design to focus on truly off-road / uneven terrain handling.
As for the ship, it's still a bit unclear where the pew-pew is supposed to come from. The series of black "de-icing rubber sleeve" blocks on the cheeks of the hull rim?
From what I can tell, it's the crevice in the shingled hull area. I could be wrong, but that's what it looks like to me.
Similar to how the USS Titan has the trench where the Phaser beam forms above it and then shoots out at the target, this seems to be a further enhancement where the emitter is buried partially underneath the hull of the shingle over hang.
But that's what it looks like to me given what little info we have from the screen shots.
The deflector here accentuates what's inherently bad about Enterprise-shaped starships: the saucer-cigar combo blocks most of the sky around the deflector or fwd torp tube position, resulting in an abysmally narrow cone of fire. Here it's even worse for the deflector. But it arguably doesn't need a wide cone of fire at the supposed engagement ranges of several lightseconds... A fraction of a degree is already plenty! Puts the ship at a disadvantage in attempts to use the deflector against nearby targets, tho.
I don't think the main use of the deflector is as a beam emitter for a weapon, that's usually a MacGuyver / Jerry-Rig solution.