mmmm, making an item that tells you how many probes there are in an area is much better than "Hey idiot, can't find the probes? Why don't you just look it up?" I feel like putting it in would be easy, but there's a lot of nitty gritty things, like "What about sub area's"(which is only in the city ATM) and "I wish there was a hotkey so I didn't have to go into the menu to see how many I have left"
For the rations, I think not healing at all is a bit rough, but healing a set amount after a dialogue encounter, like say, 50 hp, would be alright, or like Kaja mentioned, it giving you a buff or a shield from the first set of damage you'd take also sounds both mechanically feasible and fitting story-wise, ie "MMM just had a yummy snack and now my BRAIN works better"