Dynamic/Solo Q for low ELO, Solo Q only for higher ELO?

This isn't a rant, just a suggestion. I've read several threads that say Dynamic queue is hurting higher ELO players (I wouldn't know personally, I'm only Silver) but it doesn't bother lower elo that much.

What if we came to compromise with this whole system instead? Why not give lower ELO the option between Solo/Dynamic (or just give them dynamic period, that's Riot's decision) and then give higher ELO players (Let's say Plat V and above as an example) Solo Q as the only option for ranked.

I'd like to hear about what the community has to say, whether it's a good, bad, or idiotic idea to do such a thing.