New Ranked System

Two questions about the new Ranked system that's coming out in 2 weeks. Not sure whether this is the correct forum.

1. Will the ranks be similar in level of play? (In other words, will the border between Bronze and Silver hover around the same MMR that it does today, or will next season's Silver 4--the new bottom rank of Silver--be about the same level as mid-silver nowadays, or something like that?) Will the achievement of climbing to Gold next season be the same as climbing to Gold this season, or will it be more like climbing to mid-Silver or even mid-Gold in past seasons, in terms of the Elo you need to be playing at?

I guess the gist of this question is, "What will the conversion factor between old rank and new rank be?" Will new Bronze 1 be roughly equivalent to old Bronze 1, or old Silver 4?

2. With position-specific ranks, will it require us "Fill" players to play more placement games? For example, will it be necessary to play 10 games in each role to get a rank in that role? I could be playing placements for up to 50 placement games if that's the case!