How can you give the game perfect score in graphics?
Well, 10/10 does not mean perfect, it means superb. On my PC, the graphics are better than Silent Service II, better than Aces, Sub Command, SH3, and most other current games I have played. Not perfect, but clearly superb, as good as any "eye candy is not the most important part of a subsim" guy would wish for.

(the FPS monolith will soon be a bad memory

)
But 100% means perfect for all normal human beings...
Think of it like this:
If you wrote a book or an essay, or a computer game,
and people thought, this is good
or this is great
or this is really
superb, better than anything before it,
it still would never be
perfect
unless it cured cancer and banished red triangles everywhere.
But according to maths 10/10 means 100%
Consider a 5 star game, or 5 star hotel, there are lots of 5 star hotels,
5/5 is 100% too.
But they are not perfect, they don't have Swedish hookers in every room.
Good topic for debate
cheers!
Neal