1) Aimless 2) Dianoetic 3) Essayistic 4) Excursive 5) Logical 6) Rambling 1) Dianoetic 2) Digressive 3) French word used in English 4) Logical 5) Rambling 
Discursive is an adjective from the word discourse and may refer specifically to: ...
• (a.) Reasoning; proceeding from one ground to another, as in reasoning; argumentative. • (a.) Passing from one thing to another; ranging over a wide field; roving; digressive; desultory.
Dis·cur'sive adjective [ Confer French discursif . See Discourse , and confer Discoursive .] 1. Passing from one thing to another; ranging over a wide field; roving; digressive; desultory. ' Discursive notices.' De Quincey. « The power he [ Shakespeare...
passing aimlessly from one subject to another; digressive; rambling. · proceeding by reasoning or argument rather than intuition.
[Literary terms] tending to cover a wide range of subjects[Intelligent words] tending to cover a wide range of subjects