That is, the way it works for feeding/power seems to be reversed - you get more powerful the less you feed, when logically (and vampire lore-wise) you should get weaker the less you feed.
Since blood is essentially a vampire's primary food/power source, depriving a vampire of this should make them weaker, not more powerful - a human won't get stronger if you deprive them of food, succubi won't get stronger if you put them in isolation; so why does depriving a vampire of blood make them stronger?
And it seems to kind of skew vampire lore/traditions. I thought a big challenge and conflict for vampires was controlling their desire to feed and gain more power so that they weren't discovered and didn't cause suspicion; self-control vs. the primal need to feed and get more powerful. In the Elder Scrolls, not feeding basically turns you into a walking death-dealer, Sure, everyone gets mad at you, but you can kill most of them just by thinking about it at that point - or make them kill each other just by thinking about, in this case.
Maybe I'm being too picky, but its' just always not sat right with me.

The backwards feeding is the only reason I don't really like being a vampire in TES games.
.