Well I think i don't need to explain why people smurfs and why it's an issue. I like the soloQ, but most high elo player just smurf to keep duo-trio stack and avoid any restriction.
And on top of that, getting drafted with bronze peoples (like, they are literally bronze) when facing ppl avoiding the new system and likely a 3 stacks of GM and legends are just painful. Especially if you don't play an SS tier hunter for ranked.
I like the soloQ, but only if it's fair for everyone, rn it's far from being the case.