I would for one, be more interested in seeing A. unique player slots per game and B. Games run per time period to give us more info.
Also Im against replacing any queue and I am not sure why it has been brought up.
Every single queue caters for something different and each of these are wide ranging. Micros were created for people who don't have time for a larger game, and whilst I can see the point in moving them back to minis, they start to become diluted. I would bet that the people playing in micros are different to those playing in minis and larges.
I also think that replacing the open queue is potentially a bad idea, now my knowledge of open games is very little, mainly because I hate having the mystery of the game being ripped out of it, but again I'm betting the players who play opens are different from those who play closed games. Also for me, the main point in it, is for new mods and leaves them with just mini normals to get their one games experience (which might not be a bad thing, especially because there is more demand for them at the moment and it also means they are forced to make a setup) which will jam up the queue. I am also against changing the modding conditions to compensate.
The other 3/4 main queues (including large normals), are probably more mixed with players, but really replacing one of these would be a bad idea (and not being considered as far as I can see) especially for something that other sites already offer.
What's more for something that your already established player base decided they didn't want. Now I can see why you would want to attract more people to the site and certainly time frame would be one of the bigger issues facing getting new players in. I mean let's look at expanding the site, if that's your want but lets not lose a portion of your userbase because of this notion that we have to replace something.
My biggest issue when I saw this thread a few days ago was that it would take players and mods from other parts of the site, and whilst I think that could happen, I don't think it's going to be a big migration. Quick games are going to attract either players who are new and want that quick game or older players who don't want to make that 3 month commitment anymore. It's once again a different player base, and whilst I think that may compete with micros a bit, I don't see it as an issue.
---
TL;DR that graph is unhelpful in that different types of games attract different types of people (imo), replacing a queue is a silly idea for that reason. This new type of game, would mostly attract people who aren't playing otherwise. So my preference would be to add, not replace.
Oh and because I didn't bring up why I'm still against it, its mainly because I've never seen a game in that timeframe work well, I think it allows people who are game whores to get even worse (so a strict limit would be good) and attracts a meta that isn't necessarily good for the site. (although from what I've seen of our current meta anyway, its not much of a point) I also worry that it becomes a diversion for the new players coming in. My worries aren't so much with players on the site, more with players coming in and ignoring the longer games when they can get a shorter fix.