It seems off because it is off. The writing on Feeding Dependency is not great.
That's not the only problem with it, by the way. It's rather unclear how the power-losing effect of Feeding Dependency works.
It's on my list of things to rewrite.
This. Though I'd go as far as to say that Feeding Dependency is
badly designed.
I think your proposed changes are heading in the right direction; the single key bit being that hunger effects only recover through feeding. This is almost enough to make the power work on its own, though I favor going further.
Here's an idea to toy with:
Feeding Dependency [+1]
Description: You gain some of your supernatural abilities by feeding on mortal blood (page 188), emotions (page 189), or something else (in the case of ghouls, massive quantities of meat), defined when acquiring this power. If you take this ability, it “attaches” to most if not all of your supernatural powers except for those from this category (at least 2 points’ worth).
Skills Affected: Discipline.
Effects:
Hunger Is Stressful. You have an additional stress track called hunger. The length of the track works like those of other stress tracks from Endurance, Conviction, etc., only using Discipline as the base skill. Unlike other stress tracks, you may not clear this out at the end of a scene (see below). Note that because your hunger stress track will be adjusted frequently, it may prove useful to use tokens to represent lost hunger stress boxes rather than marking and erasing on your sheet.
Limited Reserves. At the end of each exchange in which you have exerted your affected powers, you take one hunger stress. If you have no available boxes on your hunger stress track when you are required to take a hunger stress, then you clear your hunger stress track and take a hunger consequence instead. A hunger consequences are treated in every way as a normal physical or mental consequence (your choice) except that it can only be recovered from by feeding as described below.
Feeding. Any time you inflict stress appropriate to your feeding preference, you may clear hunger stress up to the stress you inflicted; additionally if you inflict a consequence, you immediately recover a Hunger consequence of the same severity. Killing through feeding allows you to recover all hunger consequences, and may entitle you to additional benefits due to powers such as Blood Drinker or Emotional Vampire. Alternatively, you may opt out of a scene to feed, in which case you may make a feeding attempt via a Declaration "miniscene" (rolling as appropriate to determine the success of the miniscene).
Thoughts: to a large extent, the penalty for this version is independent of the number of linked powers or strength of those powers. Because of this, a flat +1 refresh seems reasonable. Characters with many linked powers get more benefit per stress, but then again such characters have spent refresh for that capability. Discipline is important regardless of refresh level, and no randomness (or dice rolls at all) are part of this proposal.