i like it,

.. trees sometimes die (with me frequently

) I'd leave it now till next year, and look at the group over the year, also if you so desire, look for more trees, different pot etc, look at other groups (Miagiman? Has a maple group/forest to die for

) also look to see as many groups as you can, study them, and think about how you could/would apply principles to your group. then next year, try again (If you are so inclined) in bonsai, you never stop learning, and your trees are never finished.
As far as placement in the pot, different people have different ideas, and there is no right or wrong, as long as YOU like it.
This is from someone who's been told that most of her trees are only fit for garden shrubs

so take it all with a grain of salt