Still having the same problems as described here. Dead-on accuracy everywhere (even under tree cover, etc) with LTE off, but with LTE on, often shown going down side streets that I never even traversed while on a run with inaccurate distance and pace.
I have had some increase in accuracy with LTE on using Workoutdoors with the setting "Use Calibrated Distance Estimates (Uses when GPS is off)" turned to the OFF position. It is definitely not perfect, but the tracking is a significant improvement over the regular workout app. Of course, I am but one person giving you information on a few runs, so it may not work as well in your case but it may be worth a try. It's still disappointing overall, but for those of us that need to be connected to LTE for some reason while running (but spent $500+ to not bring your phone on a run!) this could get you closer to a middle ground.