If Solo Que ever returns I hope it is similar to Dynamic Que in 2 ways
I enjoy having 3/5 people choosing a ban because now it isn't one person who can be blamed for "not banning" a champion I enjoy seeing what other people plan to play because it helps prevent bad team comps/ all same damage team comps
Although I am unsure as my stance on "roles" are since true Solo Que should reflect your ability to climb no matter what you get.
The only difference I would want is the inclusion of a 4th ban and a remaking of matching making because Que's too damn long (even as a silver I have to wait 5 mins sometimes (which is a consequence of picking roles before we Que))