Oh well, I'll post again then, why not
The UK dives will not get shredded by German fighters. German fighters will get shredded by UK fighters that will attack you at night, making full use of their nightflyer commanders. You won't have enough German fighters anyway, because you will need some for the East as well, so the Allies will have air superiority pretty quick. They will use their air superiority to trap you into the plane retreat bug which will result in you losing your entire airforce in a couple of hours. So now you can't use your dives/tacs anymore. I may have failed to mention this but my improved fighters with air to air missiles got shredded by UK *basics* at night (I lost three in just one fight).
So now you have no air force in the West and not enough in the East.
But you don't have enough land forces for the East anyway, because you built too much infantry and can't attack
Your small stacks will quicky get killed by the bombers, followed up by the invasion force led by tanks. Your remaining infantry will quickly be surrounded and destroyed and the whole of France will see German troops with the white flag in an eternal retreat until they all die

. The mobile UK force will run circles around you. The IC you spend building up the AA's across Western Europe will have Stalin smiling happily too

(manpower is also used up for this, is it not?).
Of course, the UK only goes to Europe when Barbarossa starts
Once you have zero manpower and the opposition has more manpower and better org than you, you are dead, no time for the manpower to be "rebuilt".
If you want to see less tanks in the game, you can make them more expensive IC-wise, that is the simplest solution, though you may need to rework the manpower values. This way infantry will become more cost effective and will be built more. Tanks would still be deadly though. Planes are ok cost wise as they are though.
Maybe we really should play an MP game against each other someday
