How about making it so that orcs, unless they have the daylight adaptation feat, see better at night and not so good during the day. ei see the wider map in vt and room exits during the night and the smaller map and "unknown" exits during the day. The opposit of what is now.
Also, could the shops in the village opperate at night time hours instead?
Vision
Are orcs supposed to have lessened vision during the daytime? Not all orcs necessarily have always spent their lives in caves ( and the orc village is a more open fortress than cave ). So I only think the daylight adaptation feat will be for orcs and half-orcs that come from Skullport. Darkvision is a natural thing all orcs have and even though it is black and white sight "... half-orcs ( and orcs ) can function just fine with no light at all" ( 3rd ed. PHB ).