I've played about 50-70 games, and this is at least top 5 as far as how interesting it is. Though I believe the intensity will wane in late '43.. By now its pretty evident that I don't have the punch to win the game.
The attack on the Islands started as a diversionary operation. My initial intend was to draw air from the African theatre. It started with some recon and bombing runs over southern England, hoping that maybe Mika would be alarmed and relocate air. This didn't happen so I decided to "sacrifice" my 2 paras to draw his air there. Mika chose to defend with what he got and the diversion transformed to a full scale invasion.
What he lost in UK he gained in Africa though, and after an initial breakthrough German forces were bogged down. One severe tactical blunder led to a turn were my front line had 4 supply, Mika took advantage and destroyed the DAK Panzer. However I was able to push more, and after two italian amphibious invasions to the rear, the allies were disrupted enough that my forces could advance. At some point I was sure that Egypt was won.
The turning point was that one round that I could capture Alexandria and open the straits to Italian navy isolating the entire English force in Egypt. My all out attack in Alexandria saw the valiant defenders surviving with 1 strength. Unable to take the city, my exhausted forces were overstressed and couldn't manage the counterattack. Since then its downhill for DAK.
In Russia all are as Mika describes. The Finns with Swedish assistance just captured Murmansk, but the ability of the Russians to destroy at least 1 German unit per turn this early is an indicator that the game cannot be won.
My one true hope to make the end game very difficult for Mika, is the naval war. Kriegsmarine is destroyed, but so is most of the Royal Navy and the US ships. With Swedish navy on my side, a somewhat operational Italian navy and the U boat fleet, I may be able to deny easy invasions in England, Italy and mainland Europe for quite a while.
PS Regarding the subs, no I didn't buy extra subs.