Is there a specific reason why you don't use a service like hearthstats.com instead? They do exactly the same thing.
As far as I'm aware, HearthStats doesn't project what your win rate should be in the future, it only tells you what it has been.
I wonder what you do when there is a major shift in the metagame, for example when Grim Patron Warrior went from a fun deck to best deck, or when decks are left by the wayside such as Mech Mage. If you aggregate continuously without adjusting for that you get different (and erroneous) results for today's metagame.
@Skiffington You wouldn't be so kind as to have a link to your Google Spreadsheet where I could just make a copy and plug in my own numbers, would you?
i am not too sure that people use deck archetypes until rank 16 and higher. Ranks 25 - 17 don't usually see much deck archetype so much as randomly put together decks that are good enough to get to rank 16. Obviously this is meant for higher ranks and is not necessarily going to help you get to Rank 14 every season if you cannot already do that on your own. 75% of all hearthstone players are ranks 25-15. Your deck archetype list requires you to at least be rank 10 to even effectively matter. This is my educated opinion based on the fact that you don't even start seeing patron warriors at all until 16-15, and the ones you do see lose miserably.Furthermore, you totally ignore control druid. Control druid is only going to get better with the new cards. Adding 10 mana crystals in one fel swoop.. yikes. You also leave out rogue, and only give them one spot.This chart is clearly not meant for anyone ranks 15 or less.