The effects of Vaulting
Ok, since the whole "Latest/Vintage" 4*s seems to be dead, at least for now, I figured I'd show you guys what affect it had on the game. I'll preface this with stating that I am most definitely a 5* player and I average about 3 LT pulls a day - possibly a bit higher. I track a lot of data, since early 2016 I have a log of every LT pull, some of this information is based on that data, others based on my MPQ Compendium roster.
Ok, the Limited Draw system was implemented at the same time as BH on 3/1/17. At that time, you could not draw a "Vintage" 4* from anything other than a Vault. This continued to 7/27/17, where they went with the 50/50 system - you have a 50% of drawing from the large pool of "Vintage" 4*s, and a 50% of drawing one of the 12 "Latest."
I'll pull three example characters who were outside of Latest when it was implemented - the data is when they were introduced, how long it took for me to cover them, and what level I have them at now. I went late to maximize the effect of dilution. I didn't BH any of these:
Quake (Daisy Johnson) - Introduced 3/10/16 - covered 9/6/16 - currently 308
Kate Bishop (Hawkeye) - Introduced 6/5/16 - covered 3/7/17- currently 298
Moon Knight (Marc Spector) - Introduced 6/20/16 - covered 12/5/16- Currently 308
So you can see Kate was really hard to cover - over nine months. Quake and Moon Knight took around six. Ok, three who were assisted by full vaulting:
Spider-Woman (Jessica Drew) - Introduced 8/29/16 - covered 2/13/17 - Currently 320
Venom (Agent Venom) - Introduced 11/21/16 - covered 4/6/17 - Currently 327
Iron Fist (Danny Rand) - Introduced 3/27/17 - covered 5/8/17 - Currently 329
Spider-Woman was fully covered prior to vaulting (a bit over six months to cover,) but you can see she got much higher than any of the "pre-vaulting" characters. AV and Danny were covered much more rapidly because of it - 4.5 and less than two months respectively. Danny is particularly significant as he benefited the most from Vaulting - he was introduced after it started, and was out of "Latest" prior to the shift to 50/50.
Three who were in the full "half vaulted" era, introduced after the 50/50 shift and out before it ended:
Vulture (Adrian Toomes) - Introduced 7/31/17 - covered 9/20/17 - Currently 309
Mockingbird (Bobbi Morse) - Introduced 8/7/17- covered 10/16/17- Currently 308
Yondu (AM v2) - Introduced 8/14/17- covered 9/20/17 - Currently 315
I went sequential with these since Lockjaw was still in Latest as of yesterday. As you can see, we're still covering the characters pretty fast - around two months. However, we're getting substantially lower before they're out of Latest - averaging closer to 310 than over 320.
So... yeah. Take the data as you will, but I feel that the time to complete a character will be six months or more, and we'll be seeing a more gradual leveling of the Rosters rather than getting characters to a certain point before having them slow down. Speaking for myself, I don't like it - it will probably increase my overall rewards from Champ levels (these rewards improve substantially the higher the character gets,) but at the cost of newer 4*s being pretty much irrelevant for... well kind of indefinitely, actually - unless they're a support character they're never going to contribute anything as they'll be so far behind the rest of my roster.