I have not had the same issues with the dark as everyone else I have got all the way though with an all darkvision party and most of the way through with a no darkvision party. I have not noticed much difference in the experience at all. Darkness makes fighting more difficult for everyone but I can exploit that and the monster AI cannot. I enjoy the tactical puzzle of lighting up my enemies while staying in the dark myself or, vs The Lizards, lighting up as much as possible. It does help if you have Dancing Lights to push out the illumination which means your wizard may be doing that instead of something more destructive. I have had a few issues though.
Sneaking with a torch lit. I could sneak into the goblins cave with a lighted torch which make no sense at all. Sneaking with lights in darkness/dim light should not work. Once I attack them they stand around in the pools of light near their torches while I hide in the darkness and shoot them. They are not good at actively lighting me up, or ducking into unlit areas. Maybe they should get some "fire arrows" or similar that light up who they hit (or where they hit) as well as better tuned AI.
Fighting Undead in pitch dark. This is weird as many undead do not even have eyes but they are still penalised by the dark. They should all be upgraded to Superior Darkvision IMO. In one particular case I was able to hold a doorway with a Paladin while all my guys used magic missiles or save spells to mitigate the darkness and the undead floundered away with disadvantage. My very high attack bonus with the Green Mage archer also helped mitigate disadvantage too, especially vs zombies.
Light spell is much more limited than in TT. You can use it on an object then throw the object far away. You can also cast it on allies. Giving it a range (letting player cast it on an imaginary copper coin they chuck) would make it more useful like the TT game. This does make it much more like Dancing Lights - there is not much space for both of those spells to exist really but ho hum.
You might also want to throw torches or do an Aragorn and fight with one in your off hand (or main hand). Dropping torches works, mostly - it seems to fail on sloped floors or stairs and is a free action.
A hoopy frood who really knows where his towel is.