That's exactly why It's stupid. If you want to be a powerful vampire, don't feed? Doesn't make sense. Why be a vampire if doing what a vampire does makes you, essentially, NOT a vampire There's a reason hardly anybody cared about nor played as vampires. The only point to being a vampire now is the resist bonuses and aesthics(both of which lessen if you actually do what vampires are supposed to do, feed... hence, pointless)
This
Of course, this appeals to casual gamers. We all have our own opinion

Wait wait wait, are you calling me a dang casual gamer *and others* because I like vampires how they should be and are irl movies and books and such? I am sure but vampires DRINK blood, that should NOT be a penilty at all, it just doesn't make any sense, they need blood so they don't starve!
Would it make sense that if I was starving, ate some bread than became hunger or weaker from eatting food that should make me full and strong?No it doesnt.
I know it is lore but also the whole "lore is lore" argument failed in relating it to wearing a full suit of armor that covers your face and body, again just because your character is say a stage level 4 vampire the only way people SHOULD know this is if A.They have seen a vampire wearing that same suit of armor before and guess it is you B.See you without the helmet OFF and see you ARE a vampire.
Just because you are a vampire wearing a cloak or hood or helmet that covers your face fully or in shadow, unless they remove it or get super close to you they should as normal NPCS should not be able to see
thru anything. Its like the glitch where putting a iron pot over their head, that was realistic in the sense it cut off their vision.
Also very shocked at you W&V I thought when Skyrim came out again you were the first one there with me defending the cases of how freaken stupid the vampire feeding was and how it didn't make sense.