From: St.Petersburg, Russia
Will wait for the comments. To elaborate about why I consider just adding a bunch of variants acceptable for 1945-46 - they probably need hardcore research to matter, so without a truly gigantic supply investment (which, as I'm finding now in RA, can have significant detrimental results) a player won't produce all of them. Even when they are available without acceleration building all of them probably can be unwise.
One more thought - while above I described various tinkering intended to provide Japanese carrier strike aircraft with armor in mid-game, I'm not really sure this is a good direction to take. Realism-wide, it is messing with successful designs (D4Y certainly was successful and, debatably, did more damage than any other late-war Japanese attack plane, merits of B6N are more dubious, but it is hard to tell, considering odds stacked against it - even much sturdier planes like A-20, facing relatively weak naval flak, when used as torpedo bombers by Russians, proved to be highly vulnerable). Gameplay-wise, I'm increasingly convinced that Armor 1 does not really matter, at least not by the time these planes are available. I only noticed an impact from it against rifle-calibre MGs early in the war, and even then this might be confirmation bias on my part. Maybe it can soften blows (and any feedback on this will be much appreciated), but I don't really see much effect... Certainly not on the scale to justify losing 2-3 hexes of range, which greatly reduces a plane's operational value. Maybe just keep existing models as they were and add better-protected upgrades for the final defense of the homeland?