Adjust elevation calculation
Elevation calculations are consistently way too high. I use a device without a barometric altimeter, and Training Peaks always calculates the elevation for my workouts. These calculated elevations are way too high: often twice what they should be. This is frustrating as it makes the data in the app far less useful.

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mj commented
I also strongly agree, and consistently have the same experiences as Karl. Agreed that the inaccuracy of the elevation calculation makes it difficult for me to communicate with my coach about hill work or hilly routes.
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Karl Schmidt commented
I strongly agree, the inaccuracy of the elevation calculation makes it difficult for me to communicate with my coach.
Additionally, the elevation correction overcorrects and smoothes out the vert in a useless way. The elevation smoothing should be a user choice where they can set a default an apply it all all their efforts - or just match the industry standard (Strava).
Example: Yesterday's trail run was 15.2 miles
Garmin Connect: +2677ft
Strava: +2539 ftTP: +4275 ft (how?)
TP smoothed: + 1590 ft (why?)