Solos aren't just about scales. Sure, you need to know what notes sound the best over a certain chord progression or what scales to play in certain keys... but that won't make you an instantly great solo player. You have to develop the techniques (bending, harmonics, tapping, sliding, etc...) A great guitar player doesn't have to play forty thousand notes in a solo... Listen to some of your favorite solos... learn them... watch guitarists play solos and try to mimic them. Then you will get an idea of how to play a solo without making it sound like you're running through your scales.