In no particular order.
The route down is nowhere near as bad as the Loughrigg descent. You have more choice of line for a start and it is wider. I don't like descents either but this one does not stick in the memory so it must be ok.
There are ways of calculating ascent. Knowing the scale of the map you could calculate the distance. Alternatively you can do what I did and user the ruler tool in GoogleEarth to measure the distance. The height gain is just mental arithmetic; the height of the summit is on the map, the contour lines on the 1:25000 maps of the Lake District are one every 10m so you can just count them. The thicker lines are every 50m to save time. (Check the map though, sometimes the contour lines are every 5m and it can change on the map). Start at the top, find the first contour and count down to the bottom in 10s. For the route, I walked I called up the gps trace in GoogleEarth and looked at the elevation profile.
I would not say it is anywhere as steep as than Hallin Fell - look at the contour spacing. I was surprised by your choice of line from the trace you posted. Next time have a look at the route on Google Earth. If you look at Hallin Fell there are well walked routes on and off the top visible on the imagery - these are probably the easiest to negotiate.