So how about that navy question, what European nations could have used a
larger navy?

The ones with coastlines. Even if they couldn't take part in the fairly
obvious upcoming ground war, they could help support the rest of the
world in shutting down Germany's navies and make it easier to retake the
continent.

Most of Europe's complete lack of preparation for WWII is plainly
documented and bloody obvious to the rest of us...
I wrote a long and detailed reply and then my comp crashed and the reply
went with it..The comp is still acting kinda funny so I'll give a short
answer then.Some European countries were allied with germany, many were
neutral andthose that took part were could have used better airforce and
army to preventGermany ever achieving such a victory. For example if
Benelux-countries couldhave halted German advance enough to buy more time
BEF and Frances defence mighthave better. French had a strong navy and for
what purpose ...