Here is the traditionnal topic where we suggest stuff to the devs
I will begin with mine:
I think that a will be interesting to have a litlle counter ( not sure it's the right word for that, excuse my english), like a box, where every monster on the grid apears and how many they are.
For example, if there is 17 rats, the box show the picture ( the little one) of the rats and the number 17
I think this could be useful when you want to plan your moves, especially with item like the book.
This could also applied to items when you have the torch equipped.