This is great. Most dungeons are made in a way to make the adventure work and are designed to give the players the feeling that they have not missed anything. On your map players will realise that they will never be able to see every room of the sewers. I hope they will realise, that having a good time and experiencing some great adventures in the unknown is more fun, than working through every room.
Also your rooms and corridors are structured in a way, that make even the "normal" rectangular ones interesting and faszinating.