You're either new to Colorado or ignorant of your (adopted?) state's history: this phenomenon is as old as Colorado itself, dating back to the Colorado Gold Rush of 1859. You're welcome to complain about the people who followed you, of course (a phenomenon that's also as old as Colorado), but please do not pretend that you have an exclusive concession on a state that its inhabitants have been redefining since before you were born.
Sorry, but no. CS is uber conservative, but not remotely libertarian. They're fine with using the government to enforce morality, the antithesis of libertarian ideals. And the weed was definitely NOT driven by CS. The conservatives there think it's ruining their state.
I live in Austin. It's really not that bad. Sure there are many people coming from CA (like I did 3 years ago) but Texas in general and also Austin in particular have distinct enough cultures that they haven't become just another CA. Just my personal opinion of course.
My near 40 years in Texas says otherwise. Yes, Texas culture is strong but the West Coast invasion has been felt. Less so in Austin because it was already a liberal place. Politics aside, the ethos was more similar to the West Coast.
We're used to waves of people moving in though and that's probably also what makes it somewhat less felt from the newcomers. We call ourselves the friendly state because of our welcoming attitude. However, I think if we ever flip from red to blue the pre-recession Texans are going to freak out.