Since it was on the front page of reddit, I figured I'd throw my hat back in the MMR decay/stuck ring.
I have a bunch of accounts. 3 of them I play actively. One is rank 25...the other two are rank 1. Makes sense. After seeing the reddit post by the guy who played a smurf to rank 1 but was stuck in the mid range by his main account (much like myself), I did my placement matches on my "stuck" account to see how things would turn out.
I went 17-3 in placement. I got rank 25. I went 15-5 on one of my other accounts, got rank 6, and 11-9 or 12-8 (I forget which) on a third account and got rank 5. That just echoes what we already knew, placements weren't really based on anything but the MMR you already had. The amount of autonomy from the placements was a lot smaller than some had predicted and others preferred.
The whole thing is kinda shitty, though, to be honest. I have two accounts in HL with 3k+ MMR and rank 1, but the one I would prefer to play the most has games with 700 MMR folks every 3rd game (I'm ~2200 MMR, was 2025ish before going 17-3) and about half of the players I play with there are either brand new or are just not very good and are even lower than the 1700 starting MMR.
We already discussed how shitty it can be to climb out of that low MMR hole if you get stuck there like this one account of mine has.
I'm more curious what everyone thinks about an MMR decay so that games that were played at the launch of Hero League in February, for example, aren't weighted the same (actually they are weighted more heavily because they were the initial games) as games played today eight months later. It really doesn't make a whole lot of sense, particularly when you can reliably prove you are capable of better now in 2-3 weeks time instead of grinding it out over the course of months to get to the same spot.
TL;DR - old man yells at mmr clouds, plays Nova in lowbie HL to shit on them and boost his MMR but isn't satisfied