OK, yeah I see your point I just thought you didn't know you could still see all your pictures on the map, because some people actually don't know this, I show them that you can click on the years etc.. and they hadn't noticed it.
But your point about pins is well taken, and actually I think separation could be done better at certain levels of zoom. So yeah the pins looked fine and worked better to show exact locations, but look for better separation in future releases.
Being able to separate map views into years, collections, or moments is a nice feature even if it is less accurate now at certain zoom levels, it will be fixed.