Having to deal with disadvantages in a RPG is not a bad thing.
You had a sorcerer miss 37 times in a row and shrugged it off. You might not be the best judge of the amount of frustration that others can tolerate.
In pen and paper, the way one might deal with a constant disadvantage in daylight might be to travel at night and rest in the day, which you can't do if it's always daytime.
Was a low level sorcerer on Temple of elemental evil, one of the hardest D&D adaptations to a computer and i did a no re roll run, so i had to put 7 DEX on him and was only 27 times.
On Baldur's Gate, even a mid level sorcerer has very low chances on hitting heavily armored enemies on physical strikes. I believe that a lv 8 sorcerer has base 18 THAC0 (to hit armor class zero, even with THAC0 bonuses, probably he would have 16 THAC0. If the enemy has full plate armor +1(-4 AC vs slashes), the sorcerer needs to roll 20 to hit with a knife. If the sorcerer uses the quarterstaff, with is blunt, he only needs to roll 16. But still only 20%.
When i decided to solo BG2:SoA on hardest difficulty, clay golems was by far the hardest enemies playing as a sorcerer on the earlier chapters.
About sun, a lot of games which has vampires for eg, elder scrolls daggerfall and morrowind had fully fledged sun damage along with other problems if you are a vampire. Even skyrim which is extremely dumbed down, has penalties to health/stamina/magicka on daylight and no regeneration.
Sunlight sensitivity penalty was merely a -1 to your rolls in previous versions.
In 5e its automatic disadvantage in attack rolls and perception, (i.e they have to roll twice and take the worst roll, and cancels advantage in your attack rolls) and that is a more troubling penalty in 5e for many classes in comparison.
Drow rogues could not make sneak attacks in daylight, for example (you cannot do them if you`re at a disadvantage).
In a PNP campaign is not a big deal, but in BG3 where RP is not that important and there is a lot of combat involved, the Sunlight sensitivity could be a challenge.
Did you played Morrowind as a vampire? You don't just have "sunlight sensitivity", you take constnat sun damage.
Drow is already one of the strongest races on 5e. Why not make the race at disadvantage in certain situations?
