I thought it was slightly treblie too, but I am a bass monster so that could just be me too.
It was a nice blues jam, you definitely had the right 'feel'
Some advice to your playing, I noticed from the way you played lead that it perhaps something to do with the way you are learning blues scales or chord tones, not sure which you play along to, seemed like you were playing blues pentatonics to me.
You seem to have learned Scales the way someone tried to teach me a few years ago, which was different to the way I taught them to myself. So you probably better off then I am since you got the right way first, this way isn't actually considered right, but I find it increases freedom on the neck for some players.
Think of Scales as Shapes that fill the fretboard, then think of them as connecting shapes. Your movements seemed locked into the 'known' movements in pentatonic scales.
GUITAR SCALES
Will show you the entire scale laid out on the neck (any scale you like) and this will hopefully show you how the scales connect together like two joints in carpentry..or tracks in a scaletrix if that helps.
I think once you look at them on the fretboard as a whole, you will be able to find movements within those scales that aren't sorta recognised by everyone immediately as 'the' movements of the scale and will help you improvise stuff that doesn't sound as rigid.
Hope you don't take all this criticism the wrong way, I wish someone would spend this amount of time telling me how to improve my playing to be honest
