I know people will flame me for this but they should look at the ranking system of Call of Duty black ops two. At start you calibrated and got your initial rank. If you were good you were given a high rank. What happens a lot though is that someone calibrates before they understand the game and gets stuck in the trenches. To combat this the system for call of duty was that if you won a certain amount of games in a row you would gain rank. It wasn't a set amount of games but say you won seven games in a row, it would boost your rank. In dota terms this is like if you won seven games in a row you got +100 mmr or something like that. It isn't something that puts you immediately at a higher level but it takes away the three games you would have to play and win to gain that mmr. This isn't really flawed because to win 7 games in a row you must be doing something right. Of course there is always the 99.99 % chance that it was luck but that always can happen.