I understand your point of view and all but the thing is I'm starting to get "ranked anxiety" (wanting to try new things but fearing to lose too much tmr, and I can also say that I'm not the only one).
And if I understand everything correctly, every queue is going to be a ranked queue, which makes me sad cause everyone will just keep playing the same tems over and over again (just like in every competitive game, you see only meta picks in ranked queue, this is why almost everyone of them has a "normal" queue where you don't play for ranking but just to "have" fun or try/train new things).
So yeah, I was really hoping for this kind of queue and now the news about the update I've been waiting for the most are leaving me with a lot of mixed feelings...
There will still be friendly games that don't affect your TMR, like there are now. Ladder is linked to TMR and the addition of Showdown into the game doesn't change that, for good or for worse, and I don't think we ever mentioned a new ranked ladder at any point in previous sneak peeks or spoilers of this update, and I'm sorry if at some point we gave you the impression that there'd be a new one. I'd wait until the update is live to see, opportunities for creativity are sure to be born :)