I'm sure the H3 is the reason why they don't give the H520 photographic capabilities. This month it's been 2 years since it was released and they still haven't fulfilled what they promised us before releasing it to the market, which would be a drone with many features, including being a video/photo drone.
I don't even follow the "marketing need" for the H3. The H520 currently is the only Yuneec platform noticed by external reputable software developers that develope for multiple platforms.
A route of adding all H-Plus features to H520 and every new camera (thermal, mapping, cinema, etc) release to the H520's payload options... and retain the additional RTK as a upgrade Kit and all terrain & mapping features as currently uniquely held by H520 only... this would make it their top platform and more easily justify it's premium price.
If you desired only photo & cinema features then the H-Plus should be the platform and it should be able to mount all new photo cinema cameras along with updating FW to enhance it's role.
If the cameras retain the common mount and within the payload limits, they'd offer Owners with better compatibility growth than competitors.
If needing a new platform, it should be a smaller or larger platform with new scale of payloads... not a revamped new Firmware model of same scale.
I think you'd see more Owners willing to have multiple cameras and spare platforms with this approach in platform offering. Just the cross camera compatibility would be a noticable market plus for Yuneec... it'd be a leading position, not a followers.
If it's all profit... 3 limited platforms aren't the solution. Bring out several new payloads... cameras, thermal, multispectral, gas sensors, ejection hook (exp: Splash Drone & fishing lures), add features that draws customers seeking more than 1 camera.