Considering the large debate going on over vampires and daylight, I might as well give my two cents.
I have have logged a lot of hours as a vampire when testing the alpha versions of this update(To the point I was credited by the mod author in the "Special thanks" Section of the main post.), most of them actually in survival testing how it impacted gameplay. I first looked into how early it was possible to become a vampire(Answer: Depending on luck with villages, within the first hour at iron level gear). After that, I was forced out of the light, growing my power and resources as I had next to nothing due to how early I become a vampire. I quickly started adapting my play style and gear for being a vampire, living inside the first village I found and managing my time around the sun. I found it best to start mining, crafting, and preparing for tasks like setting up a witchery altar during the day, then as soon as night hit I would feed, explore, do anything that needed to be set up outside for when daylight comes like a farm, then head underground or inside as dawn approached. As I went deep into the witchery tree, I gave myself an otherwhere infusion for a quick teleport home to safety, moved into the dimension known as "Torment"(Fun fact, you don't die there!). Once I had a decent setup, I started using the "Field" rites of transposition to set up waystones to quickly get from A to B to take care of anything that needed to be done. I slowly started tailoring my actions around being a vampire, and even become a "Hybrid" and lived with the lower blood pool. And because of the restriction from daylight, I had a huge amount of fun with this.
For those saying to "Let them live in sunlight, nerf them to balance this boon!", there is one issue with that: It leaves the whole experience watered down. You want them to be powerful they are the kings of the night, terrors of the country side, a monster that should not be taken on lightly! To weaken them to the point of balancing daylight not killing them would ruin this mind set, this play style. Daylight should never be just a "Minor annoyance", it should always be a major threat that you play around.
Instead of being turned away by the risks and problems of being a vampire on a server, embrace them!. Build your base around the idea of being a vampire, so sunlight is rarely an issue for you. Use shaded glass or sticky pistons to make safely switches for areas that need sky or day, blocking out the light so you can come in at any time to take care of business before letting them run again when you are out of harms way. Want to visit your friends bases? Build a transport network to get from A to B without seeing the sun! Not only are you safe, but your friends are happy with a quick way to get around. Want to go raid some dungeon with the others, but can't get there without going in the sun? Give the others the items for a rite of transposition, then have them summon you when they get there. Better yet, using this you could become the pack mule, for lack of a better term, bringing the items to and from the dungeon using your recall to home power and the ritual to summon you back!
There are problems with being a vampire, and you go into ritual knowing this full well. So adapt to it, play around these limitations and make the most of it. You gain a lot from being a vampire, from speed to flight to near immortality. Make the most of your power, minimize the risks, and you'll find that being a vampire is an enjoyable change of pace. At least, that is what happened to me.