I've been playing since S3 now and can safely say I could honestly care less for dynamic queue as I don't normally play in groups. What I DO find disconcerting (and I REALLY hope Riot pays attention to this point despite it being on a flame thread) after playing in plat+ for 3 seasons is how absolutely brain dead plat players are this season. S4 and S5 were MOUNTAINS above this season competition-wise due to lack of accountability for dynamic queue groups. I stated this at the beginning of the season and I still stick to it: dynamic queue players should NOT receive the same MMR gains as you normally would in a SoloQ environment. Is this stupid crest-preference crap you added going to fix anything? Absolutely not.
I've played my fair share of plat and diamond games this season (never about D4 though, so can't speak for anybody higher) and it is safe to assume that plat and low diamond play is substantially less competitive than any other season I've played. This isn't the players' faults though, they're merely grinding out free wins due to the exploitative nature of the current MMR system. The real issue is the fact that LP gains and MMR scaling remains the same for those who abuse the current system.
Will it ever get fixed? It could, but it won't as long as the playerbase moves in the direction it is going. I can't count how many games I've played where people just don't understand the basic concepts of game design. Let me reiterate for those who seem to have forgotten- THIS IS A FREE GAME. What that implies is the company who made this game is going to be motivated, first and foremost, by what you guys pay for. You blindly throw your money at their skin sales, etc etc whatever else they add to that store and forget that YOU, THE PAYING CUSTOMER, have the most say in the outcome of this game. You whine and you whine and you whine on these boards to bring back aspects of the game that made it so great, yet you get distracted by "that new cool champion" or "that sweet skin that just went half off!" and throw your money at Riot, motivating them to spend time making MORE skins and MORE champions and less time on fixing things that really should be first priotity (client bugs, game mechanics, etc)
I REALLY hope you, as players, start understanding this concept as it applies to the real world, too.
Tl;dr- You want Riot to fix their shit? You speak louder with your wallet than you do your words.
Edit- fixing things my not-sober ass misspelled, grammar, etc