I am trying to separate/split an expression (consisting of polynomials) to a list. However I want to keep the exponents intact.  Here is an example:

    k1=((x+y)^(2+e) (a+b)^(-1-e) (k - z) )//Expand
    k2=k1 /. Times | Plus  | Power -> List

output:

    (a + b)^(-1 - e) k (x + y)^(2 + e) - (a + b)^(-1 - e) (x + y)^(2 + e) z
    {{{{a, b}, {-1, {-1, e}}}, k, {{x, y}, {2, e}}}, {-1, {{a, b}, {-1, {-1, e}}}, {{x, y}, {2, e}}, z}}

The problem in this approach is it makes list in which it is not apparant to distinguish `-e` and `-1+e` .

     -e /. Times | Plus | Power -> List
     -1+e /. Times | Plus | Power -> List

leads to same `{-1, e}`. For each `-` sign it creates a list which is unwanted.

In this example,

**How do I prevent applying `Plus -> List` to the exponent?**

The reason is I want to finally get back to the following form from each term of the list at the end, i.e.

    k2[[1]], k2[[2]] etc.

where 

     k2[[1]][[1]] = (a + b)^(-1 - e) 
     k2[[1]][[2]] = (x + y)^(2 + e)
     k2[[1]][[3]] = k

     k2[[2]][[1]] = (a + b)^(-1 - e) 
     k2[[2]][[2]] = (x + y)^(2 + e) 
     k2[[2]][[3]] = -z

EDIT::

 The expected final output

     k2={
     {{(a + b),(-1 - e)},{ k },{(x + y),(2 + e)}},
     {{(a + b),(-1 - e)},{-z},{(x + y),(2 + e)}}
        }

or 

      k2={
      {{{a , b},{-1, - e}},{ k },{{x , y},{2 , e}}},
      {{{a , b},{-1, - e}},{-z},{{x , y},{2 , e}}}
         }

Such that finally I get each of the two terms ( which are separated by `+/-`)

      (1.)   (a + b)^(-1 - e) k (x + y)^(2 + e) 
      (2.) - (a + b)^(-1 - e) (x + y)^(2 + e) z

Also from `(1.)` and `(2.)` I will get each terms which are multiplied i.e. 

      (1.)  (a + b)^(-1 - e),  k,  (x + y)^(2 + e)
      (2.)  (a + b)^(-1 - e), -z, (x + y)^(2 + e)

I find the difficult part is to handle this `-`ve sign.