NOM why don't we turn the original question complete volte face and ask them if the Allies best kit came along a year (or moderately more) earlier? Hang on that would mean UK having its own manufactured VT fuses for starters, so more Luftwaffe getting shot down far sooner...
17pdr starts to make a mess of panzerwaffe far earlier too, also a very good thing, Comet and Centurion tanks at DDay, NICE.