There actually have been “minor updates” in the past, and it’s a pretty appropriate title considering the amount of content that comes to the game as part of the April Fools events.
I’ll update my Current Rumors post when we have an idea about what the event could be testing.
That Strategic Bombing mode they apparently are working on probably is gonna arrive as a non-April Fools mode temporarily and maybe get added permanently afterwards.
Gotta keep in mind that the April Fools event isn’t the only one that can introduce temporary game modes and that Gaijin does occasionally test new content in special modes either on the main client or on the dev server.
Hard to say which ones could have carried incendiary bombs and/or napalm. Some nations had more reservations (not everyone is as happy to commit warcrimes as the US, Third Reich and Soviet Russia lol) when it comes to using that stuff and just kept them around, but ultimately decided against using it.
Though Lancasters definitely did carry out fire bombing raids a couple of times.