What does Dynamic Queue offer that Team Builder didn't?

I hear a lot about how Riot wants to encourage players for playing with friends and how they want to reduce the amount of toxicity in a game. For ranked, I can fully understand how this can work, solo queue for ranked can be somewhat stressful, and I do think some of the core problems that solo ranked had could be resolved in this new method of champion select.

That being said, I must ask this: Why was Team Builder replaced for the normal queue? If you want to play with your friends in such an easy way, then everything is in front of you and you could wait for someone to fill in the gaps if you needed to. Your friends might have a predetermined idea of what they want and carefully plan things out (if they cared all that much), then Team Builder did just that. Now that I think about it, though. I guess the better question would be this:

What does Dynamic Queue offer to players, that Team Builder didn't have to offer? Specifically for this idea of playing with your friends.

Edit: It seemed like my question was glaringly obvious, sorry about that. [zombie-nunu-tears]