You've already mentioned feeling more in control on descents on the Guru. You can take it apart and travel with it. It's been made for those things. There are things you can do to make it faster, like lighter wheels, but why bother? Just remember it's not your fast bike, it's your comfortable bike, and not beat yourself up. When you want to go fast, ride your other bike.

And, try it on some different routes. You may see it's faster than the other bike on hilly rides, because of better descending.