balance ranked by splitting up the ban and pick phase?

why isn't the ban/pick phase the same in ranked as it is in world's? It doesn't make sense to me. It takes what 30 more seconds? a minute?

What other reason is there that it's not in the game? Autofills dodging games because Irelia or something on enemy team? Just default autofills to first ban phase. problem solved. Yeah one-tricks have a higher chance of getting their one-trick with a split ban phase, but the majority of one-tricks are never banned out anyways.

any discussion here? I've thought about it for awhile, and I feel like it could only help. The ban/pick phase is huge and many games are won right then and there. A team's composition is a big deal.

I've been counter picking since..like..2004 or something. playing dota allstars. lol. one trick TA that would only pick a CM as a hard carry IF the enemy team was heavy on the hard carry side...like, imagine having 3 adcs in a single LoL game. Yeah, dumb, but people would do it all the time in Dota allstars. CM, a support, picks up Blink dagger into Lothar's edge and game was over. 90% winrate with that throneit mod that automatically split teams based on player wins/losses. LoL.