Champs in Pro League are almost all the same
I've noticed while watching the 2015 world's that the same champs are always appearing in each match with a lot of matches being almost identical in team composition. I realize that there is a meta and certain champs are just OP and that a few champs get chosen to counter each other, but I was wondering if anyone could provide more specific benefits or reasons why we are seeing the same champs again and again. I've been following a lot of the pro matches for a while so I've heard the commentary that the casters give during champ select, but some times I am still left wondering "why choose that champ in that situation?". I will also admit that I am currently hovering between Bronze and Silver skill wise and the team comps down there are nothing like that at the Pro level, which is probably another large reason that I'm not seeing the connection. I also found that when looking at my champ pool, I only have/play maybe 15% of the champs at the Pro level. Here is list of some of the champs that I almost always see appear in pro matches:
Kalista Corki Rek'Sai Gragas Lucian Lulu Lee Sin Trundle Thresh Alistar Gangplank Braum Kindred Ekko Elise
I know there are a few more that are always appearing, but if you follow the Pro matches, you probably already know them. Anyway, of the close to 130 champs, why this same rotation of 20-30 champs?