Try to play it with someone instead of just seeing it!
Sorry mate, but you can't realistically expect people here to actually play your map when there's nothing "at first sight" to attract them to it. There are vast numbers of custom maps out there and most of us only play a map if it shows some obvious promise. Indeed, many of us (including me) hardly ever play games at all any more! Most of the time I won't even bother to download a map, let alone play it with other people.
We can talk all day about theories of gameplay. I have my own theories too, which are extremely detailed. Regardless, there are many different styles of gameplay. Personally I feel that maps with lots of different possible firing positions - lots of places to look at once - encourage less
intelligent gameplay
than maps with a more straightforward layout.
Whatever theory of gameplay you hold, there is no need for a map to look boring in order to promote that sort of gameplay. Putting effort into the atmosphere - visuals, sounds, theme... - will improve any map. Most people around here consider it lazy not to bother with "the look".