Resource rate and raid rate sliders are both coming in the upcoming difficulty options. No mention of any adjustments to weight capacity or inventory space, unless you consider the inclusion of modes like Hammer Mode which effectively eliminates those aspects of the game by making all construction free. I'm guessing that is probably more extreme than you are wanting though.

One thing people have been taking advantage of for a while is modding, but with any game that is still being actively updated you want to be careful with what exactly you are installing. You might get away with lighter adjustments that don't need to touch your save data such as a change to item weights, but if for example you were to add anything that injects new types of information into your save data, you present a huge risk that a future patch will render your save incompatible.