i like that.. there's no reason the party shouldn't know the quantity of something it's holding.
and i dunno how one reminded me of the other, but i think the Scan spell should tell you what statuses a target currently has. characters can only have their sprites modified to show so many statuses at a time, and enemies outright won't show most statuses (barring things like the healing/damage numerals for Regen/Seizure), so a more complete way of ascertaining would be helpful. i remember talking to Imzogelmo about this idea awhile back.
Stealing this idea from FF5? I don't have too much use for it.. other than making Scan slightly better than useless. I can only find a very few statuses that are worth finding out.. other than those that are inflicted or are initial statuses... Any status that is the equivalent of Stop isn't that great... unless you want to insert a visible timer like Condemn in FF5.
A more useful idea is to have some visible timer on monsters that show how long a Stop-like status would stick (includes Sleep, Condemn, non-perma Reflect, and Freeze).

Here's a list of statuses worth finding out for this proposed Scan version (IMO, and as far as the eyes can see):
Blind - although, if the monster seems to have problems hitting you, it's a dead giveaway
Zombie - though it shouldn't be possible in the first place
Count/Condemn - I like my visible timer idea better
Image - that's probably the only status that makes sense, though if someone were able to modify the monster graphics for this, it would be very awesome
Mute - though, spell casting failure should make this woefully obvious
Berserk - well, it's not as if they weren't being vicious to begin with...
Sleep - the graphics for the timer ending is enough for me though...
Haste/Slow - meh I guess, but that should be considered part of the monster's natural agility/speed
Shell/Safe - part of the monster's natural defenses...
Reflect - um, shouldn't it be obvious by default?
Freeze - falls into Stop catagory
Life3 - probably the only status worth paying attention to, but you'd find out when it is too late anyways...
Float - isn't Quake the usual dead giveaway spell?