Thanks for the links. 45° degrees looks really nice and is a good compromise between total front which is quite boring and unconnected 90° pictures.
I think the main problem right now is the bad mapillary viewer. You should be able to choose from any available source at that location. Not only those the algorithm put together somehow. Maybe they could set a little photo list on the bottom, where you can freely select any pictures taken closely to the current location regardless which direction mapillary things they are directed to.