In some comic arcs, the Skrull can be seen as bad due to their actions and motives. However, there are also instances where they have more complex and nuanced roles.
Definitely not. Rhodey's character in the comics was never depicted as a Skrull. His role and development were consistent without this element of transformation.
The strength of the Kree and the Skrull varies. The Kree often have more advanced weapons and a structured hierarchy. However, the Skrull's ability to blend in and surprise their opponents can tip the scales in their favor. It really comes down to the particular circumstances in each comic.