I have barely been on here the last few months as i have had so much on in real life that i literally haven't had a lot of time to be on here.
I completely missed the 'Newbie/Junior member/1 merit' implementation, but i must say that in the past few days i have browsed i can see its definitely paid dividends with a much improved and organic posting behaviour on here as opposed to a few months back when the quality was pretty drastic to be honest.
Starting a new thread in Meta for just posting your observations about the improvement of post quality is not necessary (After you barely been on the forum last few months)
Imagine what would happen if all the users come up with their own threads in Meta to share their experience about what happened when they were not active for a few months. So next time it is better to read the old threads regarding those changes which already discussed several times. If you want to share the view of your side better to reply in the original thread instead of creating a separate thread.