I find that a bike starts to look cluttered as you hang more "stuff" on it. Unfortunately, sometimes stuff is necessary. Lights, locks, luggage. All you can do is choose nice looking stuff that goes with the bike, and consolidate or streamline stuff when possible.

For example, you could skip the separate U lock holder and simply keep the U lock in your panniers. That would save a bit of clutter and a bit of weight.

I have a small Carradice saddlebag where I keep the lock, as well as gloves, map, tube and tools.