It isn't simple to setup. An "always on" event is required, but I find that I like it when healing items are regenerative instead of instantaneous. Especially with SOM it prevents the player from simply pausing the action over and over and over to just complete a fight by using up their healing reserves.
It would be cool if magic worked the same way (because it just feels more natural) except that you can't trigger events with magic without using some error prone trickery. I think Ex can add something to SOM's book of tricks with respect to support magic, just need to do some work to detect what menu items are highlighted which is something on the todo list anyway.
An idea someone had was consuming two types of medicines together can have a third effect so that you can kind of combine them by digesting them. It's a little strange but it's probably a lot more convenient than an actual combination system which SOM can't really do anyway. I never enjoy item combination in games myself.
I had the idea of having an item that does random effects, some ill effects, and I think that sparked someone's imagination to have combinatorial effects. I actually think that is more useful as a way to limit item consumption by having ill side effects more often than not, but a positive side effect is a good reward for experimentation I suppose. An overdose system would also be neat.
I posted a new and improved evtcat.exe program and an evtcat.bat script for synchronizing always on events a while back. I think Ex could simplify this by maintaining a counter that reports the last item that was used. Then a single event could just check it each cycle.
PS: The clams are clever. They are like little compacts. Very portable. Oyster on a halfshell. Slirp. Will there be versions that are larger on the inside signifying greater potency? Anyway, anything is better than herbs. By god I don't want to see another "herb" as long as I live
EDITED: I also like the bone. Anything to make the adventure fill more makeshift is great. Especially if you start out with little in the way of equipment. Most of the equipment in Dark Souls is too silly or unbalanced to be useful. You never really feel excited to loot a new piece of equipment because chances are it is something you would not have anything to do with. I would really prefer if the big comical looking weapons are something that is absolutely frowned upon by Sword of Moonlight's artist community. I realize having all of those items helps the pvp community feel more diverse cosplay shenanigans wise, but for the average player its just a chore to sort through all of the gimmicky weaponry.