Once you get on the Mojo and start riding it, you are going to totally forget about that propedal lever. Seriously, unless you are riding on the road in the big ring in a full out of the saddle sprint, it's just not even something that most riders consider. The suspension is truly set it and forget it, Ronco style. heh
You can run the Mojo with as much sag as you are comfortable with, but you probably will find (like many dw-link riders have) that in dw-link world, there is no major detriment to running 30% or more sag. Running more sag is going to end up giving you more cornering and climbing traction especially on the rough stuff. If however, you want to run less sag, go for it. It's your preference. That's what makes your bike ideal for you and nobody else. Play with it and have fun.
You asked 4 questions in your first post. They were:
1) Is it really going to feel that much better?
2) Does the DW link suspension really work that well for pedaling and trail riding?
3) Is it lively on the trail?
4) Does it pop off of lips and flick around easily?
Here are the answers:
1) In my opinion, the difference is HUGE, and here is where you will notice it: first, successive square edge hits when you are climbing or accelerating. The Mojo is still going to accelerate efficiently, but is will still absorb the smallest bumps. AND second, high speed sweeping corners with mid corner bumps: The dw-link will react instantly to the bumps in the corners, and your bike will track more smoothly. This is really most noticeable at the limits of traction.
2) Yes, I would argue that there is no other system better suited, but don't take my word for it, give a test ride on a bike that's set up for you!
3) Yes, very. No extra low speed compression damping to slow things down. The dampers use juuuuust the right amount of LSC and no more.
4) Yup, like a champ. Take a look at a video of Lopes on A-Line at whistler.
Nothing is going to substitute for a test ride, so get out there and pedal!