Is RT inherently conservative?
Yes. Firstly, that's a good thing. Conserve rhymes with preserve, and we are to preserve the message. This is a godly mission, and we can expect a fight when we take up the mission: "I found it necessary to write appealing to you to contend for the faith that was once for all delivered to the saints." (Jude 1:3)
When I was 8 I received a record player for my birthday (yes, I'm that old). I played a few records on it and then I decided to make it better. I didn't know how I would make it better, but I reasoned that in order to make it better I had to take it apart. I found a screwdriver and a butter knife and proceeded to dissemble my gift. As you might have already guessed, no music came out of that record player ever again. It was a perfectly good record player. It did what it was supposed to do. It worked until I messed with it.
Now that's an imperfect analogy. I'll grant that, and if I were a liberal I would have 3-4 arguments against it already formed, and yes, there might have been a way to improve on my little record player had I had the skills to do so. . .
However, the object of our faith is perfect, and the word He gave us is perfect. The story of redemption He has woven through history is beautiful. We only ruin Christianity when we try to improve on it. We only ruin Christianity when we think our ideas are better than those which come from the mind of God through the pen of men. We make Christianity unable to do what it was meant to do when we foolishly take our "screwdrivers" and "butterknives" to it, as I made my record player unable to do what its designer make it to do.
Reformed folks want to always press toward the original. We don't want to constantly change things up. We understand that what we have - what was given to us, does not need to be changed, so yes, RT is inherently conservative.