That is pretty darn good for free flying... We have seen WAY worse. Plenty of overlap is good. The only better thing is plenty of overlap while travelling at a consistent speed which is probably really hard to do manually. The differing speed will throw the model off a bit.
Now the bad news... small, smooth, featureless objects like bridges, pipes, wires, etc are all nearly impossible to process well with photogrammetry. You can try to work closer to them to pick up any minute details to aid in the 3D reconstruction but it will always been an uphill fight. You will want to invest in a circular polarizing filter to block out some of the reflecting areas that are a bit blown out. That should help. Bright days are good in some ways but since almost everything you are trying to capture is reflective that brightness actually hurts you.
We deal with a lot of power companies and they have OK/better luck using really high quality optics and the Inspire 2. When I say high quality optics I mean $2k lenses... Zoom in on your original images on those areas and understand that it will only get worse from there.