There are springs with increased rate (Eibach claims 10% greater rate, Tuff Truck makes some that are supposedly heavier, the Superlift 140's are progressive with a significantly heavier load rating) but that does not change the vehicle's rated payload only how much it sags while loaded to maximum. There are airbags available as well.
The rear differential can be made to accept the carrier from an earlier Ram, which opens up the door to true-trac and other (different from OE) clutch locker options. And you can regear and all that...
but also I'm not sure how much that matters.
For example you can get 3.92 gears and that coupled with really any of the engine choices and the low range transfer case gives you ample power to the ground for anything. Like what are you trying to accomplish exactly that 3.92 gears and 410 ft-lbs won't do? For perspective you have 410 lbs of torque times a 4.71:1 first gear ratio times 2.64:1 low range ratio times 3.92 axle ratio is 19,985 ft-lbs to the wheels in first gear low range.
The Ultimate Overlander Landcruiser VDJ76 can deliver a maximum of 11551 ft-lbs to the wheels in first gear low range and that's nothing to deride - but still less than 60% of what a regular ol Ram 1500 does.
You can fit 35's or 37's on a 1500 if you want to and you can turn them just fine on or off road with stock gears, even with the V6 engine.
As far as traction aids go, the factory limited slip differential from 2013 onward doesn't even have any preload on the clutches so they don't see any meaningful amount of wear just driving down the road or going around corners. Since all '13+ 1500's have the low speed traction control from Jeep ("BLD") they just rely on that to load up the LSD clutches and it does an excellent job of that. The rear axle binds up tightly, very fast and delivers basically the same result as a locker. Somebody reading this right now is getting sand in their underpants at what I just said but let's not be pedantic about it - context is important. We're talking about an overlander not a rock buggy. I've owned 4wd's with full lockers and done my share of proper rock crawling, I wouldn't take a full size pickup truck rock crawling. But I know what fully locked diffs feel like and on deep moguls in my Ram with just the factory LSD + traction control I can't tell I don't have a locker. Even on booger trails it stays in line and hasn't overheated the brakes because the LSD and traction control play nicely together and amplify each others' effectiveness.
What I'm getting at is you can point at the absence of a locker for the 4th gen (you can get one with the 5th gen..) and you can point at the lack of regearing choices and you can point at the coil springs and the IFS or whatever and say that disqualifies it from being a good platform but that's really all just web wheeler bunkum. Out in the really real world none of those things are handicaps.
Three things stop mine: 1. how fat it is 2. covid precaution Canada border closure and 3. how little vacation time my wife gets.