I think a few things can be said about this, but I suppose my first concern is that I’d be careful about where the path gets located. Placing the path as it’s shown here builds in distortions—in part because the far side of the cylinder has the longer arc to follow.
Keeping everything the same, what happens if you were to center the path along the center point of the circle?
…Distortions still exists, but you’ve now halved that by running the path down the center line.
Sometimes it’s better to over shoot the rotation you want to make. Then go back in, and trim back to the desired angle, afterwards. (… A cutting solid can be paired with Solid Tools ‘Subtract’ command… or, a cutting plane can be used with the ‘Intersect Faces’ command).
Also, having a little bit of ‘lead in’ (…and lead out for that matter) produces better results then just going straight into the curve… If that makes sense. Thus that bit where you started off by pulling up,… could be better placed as part of the path… as a straight lead in section going into the 90º curve.
[… kept in for context,… But, Box has provided a solution and correction to my following comments.]
On a different point of discussion,… because SketchUp uses straight line segments to draw all of it’s curves, and arcs with. It’s worth keeping in mind how the segment count divides into the angle that’s being used.
Just to ensure that there are always full line segments in place… so that you’re not coming out of a turn which happens to end midway on a line segment. … see @Box correction, and Solution below:
SketchUp’s default settings here divide into 90º well, so this isn’t really a concern unless you’re changing these settings around.