Interesting. I don't immediately support the character bans but after seeing several top tier players using multiple character (Momochi, Punk, KnuckleDu, Itabashi Zangeif, Smug), I don't think it'll be too detrimental at the point in SFV's life.
So who are the captains going to be (if I understand the process correctly):
I'd really like they take advantage of this tiny Warzard push to get rid of the awful localization. It's probably too late for Vampire, but can we at least revert Kenji and Tessa to their original names?
At least for the heroes. For the enemies.......... yeah, it's a bit complicated.
The new stage, Kenji costume and who knows if something else.
As I remember the current Uniqlo ads end on March 31st, if they have another set to play just after them I assume they will be included in this update. As I remember one of the recently added costume DLC bundles was going to expire this March, so it's safe to assume they'll remove it that day. Who knows if they'll replace it with another costume DLC bundle (a Mega Man bundle maybe?).
Remember that with the current update they already added placeholders for the next 10 crossover costumes for Extra Battle to be released after Leo, each with their music track. This means that unless they put more than one new costume at the same time, if they put them with only one new costume after another at the same time non stop we'd have crossover costumes in Extra Battle until mid February 2020 just with the ones already listed in the placeholders.
In this update they also added a few additional costumes that were likely to be paid costumes (as I remember there was even more already there), plus a "classic" one (name that received the Fighting Chance nostalgia costumes for the 4 kings).
Regarding your matches, I think they fit perfectly, but I'd choose Menat for Mei Ling. I'd choose Karin for Tessa/Tabasa.