25 March 2019: Kouya no Kotobuki Hikoutai is good, but I wouldn't call it magnificent
The air battles in Kouya no Kotobuki Hikoutai (The Magnificent KOTOBUKI) are consistently fantastic. Those alone managed to keep the show at the top of my Winter 2019 list all season long. However, I never got particularly invested in the story or the characters, perhaps with the exception of the flashback-heavy one with Kylie before she became a pilot. In contrast, Mizushima Tsutomu was much more successful with GIRLS und PANZER (admittedly a very tough act to follow), which has much more engaging characters complemented by the excellent tank battles.
With 11 episodes down and presumably only one to go, KOTOBUKI seems poised to hit its big finish. This would have greater significance if I cared more about the characters or the things they had at stake, but at least I'm confident the dogfights will be awesome. Incidentally, since my initial post included comparisons with Girly Air Force, I suppose I should note that my interest in Girly Air Force crashed and burned within four episodes. I don't think I've seen anyone else mention it on the Twitter in all that time either, so I guess it probably didn't have enough going for it even if Eagle was very American.