Duoing needs to change for that. Duoing off tiers is awfully because MMR is whats used to build games. It wont break MMR but the way its set up has a worst case where MM has to search over a gap that gets as large as 80% of the games player base. Realistically that's an outlier, most likely its in the 40%-60% ranges but that's still fucking massive gaps in skill.
From a MMR system standpoint the main benefit of riots Tiers is that you can make your MMR gains and losses higher so that bad players and good ones get out of range faster, with out players being rewarded/punished for playing at high uncertainty.
This year is going to be Fucky btw. Riot tried to make changes to deal with player complaints that they really shoulda just told people to live with.
All accounts need to grind to rebuild the ladder and every low game account represents a much higher uncertainty then previous years, New tiers, new starting MMR? More chaos more uncertainty. All low game players are going to be a real risk of inconsistency.
Like I said in my mispost earlier matching experience (or K factors) would create a much better quality for people with some games under their belts. Downside is high uncertainty games get even worse.
@Mavrick. Abusing 3rd party sights that use Riots AP is fine for MMR. Your just lowering the time to reach your range. Once your a handicap for your team your a handicap in all your games. If it ever becomes to large of an issue for the game then riot just changes their API and poof problem is solved. Personally I take RNG luck of the draw because dead weight just gives me perspective on how much weight I can pull. And I don't foolishly think im actualy a pro player whos hard stuck because bad teamamtes. I started at bronze, got better over the years, Plats about as good as I can make it. I enjoy playing.