It's only the 25th...was the 24th when you sent that message. That's almost an entire week to go... I think the more likely story is that Krysyy/staff had an update to test and attend to, and that took priority.
Update on status with the flags: World of Color update changed map colors. Sooooo....in order for the colors to not be wrong (tan instead of white) they all get to be world edit fixed. Expect a slight delay in the release of the rest, but will be by 30th.
Matheus made Mexico and Spain, but I'd say those overall. Ones I did: The stars on the first flag (the US Flag) were the most annoying to get the spacing right. The Empire Minecraft flag was tricky to get it to look right.