It does seem like there are a lot of modifiers to decrease chance to hit (elevation, darkness etc) that don't exist in the tabletop. I get that using elevation instead of quarter/half cover is more intuitive and possibly just easier for the game engine. But darkness shouldn't affect chance to hit unless it's total darkness, in which case the player has disadvantage. Without improvements to chance to hit these malus's make it harder to hit someone in the game than in the tabletop. It would be good if the chance to hit always showed a breakdown of why that is the percentage. If you're going to give a percentage it would be good to explain it so players can learn the systems.
