1. I'm trying to find a happy medium in which an enhanced Japan can fight on more even terms more deeply into the games. So if the R&D allows PH to produce better aircraft in 1943 and 1944, that's okay. On the flip side, I was a little worried about 1942, when Japanese airpower under PDU On can be a killer and yet PDU Off seems to swing things the other way. There doesn't seem to be a happy medium, so I'm hoping better Allied torps will even things out a bit.
I would be willing to play with this only if you saved Scenario 2 in another slot, added an upgrade path for the PB and slower SC that allow them to get the Type 95-2 DC to give them a better chance at damaging or sinking Allied subs. Either a late 42 or early 43 upgrade would work. As it now proposed, PH will need to increase his Merchant Shipyards to keep those transports coming out in a timely manner.