I assume the TrailsForks, Strava etc are all using the horizontal readings and mapping them to a known elevation map to generate the elevation data, or at least using that to 'correct' the figures. The more accurate the coordinates are then the more accurate the elevation data will be if using known elevation maps. Think about traversing a steep mountain side, 5m drift uphill then 5m downhill away from your true position could cause a huge difference in elevation recorded. This blog explains it quite well: http://regex.info/blog/2015-05-09/2568
Once you're at the start of Into the Mystic it's not technical at all, but I'd say 1 or 2 degrees steeper than you'd really want it to be. It's a grind, but it does have a few flat or downhill spots where it's easy to catch your breath. Probably 7% grade on average?
Probably hard to get the size right on those. The squirrel catcher was made easier which might have contributed to more people crashing? I've also seen a fair few folks needing patrol assistance on that section.
Before last year I always found it was easy to go very large on the second jump then last year (I didn't have a pass) was surprised to find it had gotten longer.
I've seen an ebiker crash up hill on Into the Mystic (which they shouldn't have been riding). Looked like they oversteered out of the corner due to the motor kicking in and they ended up off the bike and in the ditch. I can absolutely believe that there's extra wear being caused in places that it wouldn't have been before.