This right here sums up why TES lore is so botched and inconsistent: because it's at the bottom of the priority list, and thus gets shoved around on a whim to the most mainstream player demands.
I wish Bethesda would learn to say no. "I don't like having stage 4 hostility!11" No [censored]? You're not supposed to. Do you not like taking damage either? Should we remove player damage from the game so you can choose to roleplay when your character dies?
It's a downside to help balance vampirism. Downsides DO actually have purpose in games, and no you're not supposed to listen to the people that fail to see their purpose and only think "downside = bad in every way" instead of "downside = good game design, bad to have for my character but might be worth the perks that come with it." If you listen to those people then you have a walk-in-the-park game that's just damned boring.
Exactly. This is why the Elder Scrolls games are going downhill, and it is beyond the whole Lycanthropy/vampirism issue. But in regards to vampires, this all started with Morrowind. Noticed your character in Morrowind could barely talk to anyone if a vampire, which made quests difficult to complete. Even ingame dialogue says no vampire could blend in, because they are so hideous. People complained about the sun damage, about the difficulty in completing quests. Of course, this was fixed in Oblivion where the vampiric player could blend in if he fed(and dialogue talking about Cyrodiilic vampires actually exists in Morrowind, too! And even foreshadows about Janus Hassildor and the rest). Sun damaged only happened if the player fed on a person as well, giving him 24 hours to walk around unharmed by the sun. To stay in that stage, all the player had to do was avoid sleeping/resting and his vampirism wouldn't progress.
Yet people complained about vampirism in Oblivion:
"Why do we have to feed on people, Bethesda! It is so hard! I can't even find a sleeping person, even if there are beggars in ever damn street corner!" or "why do resist talking to me when I look like a fugly pale monster? Even if I have Vampire's Seduction to boost their disposition toward me, or feed on beggars just down the street corner, this game is too hard! Vampire gameplay svcks!"
Then Skyrim came out. Notice we don't burn in the sun as we did in Oblivion. We don't risk roasting to our deaths. Our stats are merely depleted. We also didn't get significant boons as we did in Oblivion. Feeding was the same, and the mechanics were the same, yet people attacked you this time around in stage 4, as opposed to only guards in Oblivion attacking you for being a vampire.
People cried out to Bethesda, whining why their game is so hard and why villagers were attacking them. Then Dawnguard came out . . . and let me not get started on this.
To me both vampire and werewolf lost their "it's a curse and a blessing" feeling.
Now it feels like "hey wanna be a cool kid, like the one from the recent werewolf/vampire movies?... Not convinced?... take a look at our sixy examples...."
Are there any downsides? I would say no.
Werewolf: no resting bonus (not a problem, are there even downsides in being a werewolf?)
Vampire: reduced stats in daylight (also not a big deal) + weak to fire (ok that is a downside)
Both of them lack to provied a real change in the gameplay of the player.
In other words: Being a Vampire, walks in Sunlight. Being a Werewolf enjoing moonlight as a human/mer/cat/lizard/whatever.
And the lore is bend with the simple "It is a special form of" solution.
In other TES games i really need to adapt my gameplay or use items that help me counter a curse.
Now it is just boring, simple, and just another transformation....
You are totally right. There are no downsides of it. You know what Vsions said on lunar transformations?
There are things I would like to have been different as well. But take your change form at will example. Who do you appease one group without upsetting another? there are alot of people that want forced lunar transformations. Then there are some individuals such as yourself that want to be able to change at will. So we try to find a middle ground as best we can. We also provided the vampire lord form as a beast form that can change at will. I hope that relates some of the things we have to think about.
Forced Lunar Transformations? well honestly I think most people would hate it immediately after they love it. I remember playing GTA 4 and getting phone calls from the different people I met in the game that required me to hang out with them in some fashion or another in order to keep my relationships with them. At first I was like this is friggin awesome, about 20 phone calls later I hated it immensely. Forcing players to do tedious things is tricky stuff and can become frustrating.
This goes to show they have good interests, but their catering more to these little kids who can't accept the fact that vampirism and Lycanthropy has its disadvantages. Lycanthropy could have been the same as Daggerfall. You have the option to transform TWICE at will, and still have forced lunar transformations. You also had to kill an innocent person to sate your bloodlust. To combat this effect, all the player needed to do was to equip Hircine's Ring and he had no bloodlust, and no forced transformations. Simple. Sinding wanted the Ring in the quest to control his forced transformations as well, so why not implement it in the game? Because people cry too much.