The Blunderbuss is great for destroying minefields in front of you. It's really great to just tail someone whose only strategy is to fly around dropping squitos mines while repeatedly shooting them with the blunderbuss. Destroys the mines and them.
But, I can understand what you mean. Sometimes I wish I could just fly around and use guns only. Having to constantly destroy mines and do tricks to drop the leeches off gets annoying after a while.