Hi djmcconnell,
This is a great question. What you're starting to realize is that there is something different about an actual solo as compared to running endlessly over scales. (some people never realize this
The fact that you're thinking about this is great.
The key thing to remember is that improvisation is very similar to language. It has many of the same concepts. Scales are similar to the idea of words in a language. The notes in a scale are like words . Playing an endless series of scale sequences is like speaking with a whole bunch of words but not really saying a comprehendable sentence (like reading from a dictionary).
This is why it's a good idea to learn some licks from your favorite players after you have your scales under your fingers. This is where you begin to see how you can string together these "words" into meaningful sentences. By getting a vocabulary of licks together you begin to arm yourself with some usable "sentences" to use in your solos, that don't sound like rambling.
Pretty soon you will begin to take these licks, and tweak them to your own liking (stealing one part of a lick from one player and combining with something else from some other player, etc). This is how you develop your own soloing style. In a similar way, you learn to speak as a young child by imitating your parents. Using some of the same sentences and phrases that they use.
Knowing all this, is it still important to practice your scales? Absolutely! Knowing your scales will help you to understand the licks that you learn, and make sense of them. Practicing scales also help you develop your technique. But scales are just part of the equation. The next part is to put those scales to work with some licks. There are lots of good "lick" books out there covering various styles. This might be one place to start. Or, just start learning a few from your favorite players. I started with some Blues players when I first got into soloing. Some players are easier to copy from than others. For basic blues stuff I used to get a lot of good material from playing along with Eric Clapton or BB King records, since they tend to play very clean phrases and not too flashy.
I hope this helps, -- Jim