It very much depends on what your business model is. The H520 is quite a different beast to the I2, and if you come to it expecting something that behaves "like a DJI", you'll have a hard time of it. The camera undoubtedly needs more work than the X5/7 to get 'cinematic' footage, but for surveys and inspections it's a pretty good platform.
From what I've heard from Yuneec, they recognise that there is work to be done to keep competitive with DJI - and the changes the company has undergone in the background this last year has not made that easy. However, to their credit they continued to support and improve the Typhoon H far beyond initial firmware fixes, and if they can evolve the H520 the same way, it will be a good long term platform.
If not for Tuna's great app "UAV Toolbox" for the Yuneec H480 & 520, there isn't other 3rd party support in comparison to the AutoPilot, MapPilot, Litchi or DroneDeploy to mention a few, not to mention the specialized apps for Thermo, IR, SAR, Construction or Ag.
I sold my I1 when purchased the H480 & H920 birds and later purchased a I1 X5R for the autonomous and semi-autonomous flight modes or airspace mode (drone to drone capturing).
I'm optimistically anxious to see the 520 or the H Plus prosper and take off with Yuneec OEM tools but would also be very beneficial... practically required to have 3rd party Software\Hardware support too. It's clearly not the android platform of the ST16 preventing, most all the above apps support the Android platform, it's more the position of Yuneec's proprietary market stance. The all-in-one RC & Screen is also a great advantage in several ways in comparison, but even that's not properly marketed.

Although, I'd offer a slight change in RC unit by modifying the package slightly with an ejectable screen mount and offering upgradable screens for brightness & clarity (3rd party). Modified plastic case molds and electronic plugs are cheap to add in comparison to add-on sales.
It's a life cycle of what's feeding what... SW or Hardware, both are needed to advance and compete. The benefits of the Hex platform are well acknowledged, and Yuneec already has a major lead offering several reasonably priced Hex platforms in comparison to other offerings. If they had the support of 3rd party innovation and marketing, they'd unquestionable sell in the growing commercial market. Why this isn't being utilized as an advantage results in both current market loss as well as future.
I've noticed an uptick in commercial outfits purchasing DJI Hex with current price drops and offering commercial focused platform options: 2 belly camera mounts, 1 top camera mount, multiple video stream options and multiple options for RTK GPS modules. This demand isn't great yet, but again... cycle feed... Hardware / Market; the technical commercial shops will respond to maintain an equal or competitive edge. Yuneec is prime to jump on this growing commercial market; but they're currently reluctant or unable to move on their current product offerings.
We all gain with competition, I'd really like to see Yuneec perform; as well as Autel and other smaller companies. I totally dislike a market of one major player, but if 99% of the the 3rd party companies utilize one company... again cycle feed equates win-win.
The philosophy is consumer market is the bread & butter... I'm not convinced that has to be the path followed in today's world of technology & marketing; it wasn't at the beginning of transportation industry, telecommunications, sporting goods, and most recently the computer industry... the consumer market grew out of the commercial professional market... it's how it's marketed.
Personal (Consumer) Computer development wasn't the original focus, it was spawned to meet the desire of the professional having their own, this drove the layman to have the computer, and that drove mass consumer market. Professional needs drove the cellular telecommunications which drove consumer market (Military is considered professional). Acknowledged, the drone industry is already consumer and commercial, but that doesn't indicate it's stuck in a path... the bicycle was primarily a consumer comercial product, quickly faded as commercial, later faded in consumer market too. Later with the development of hi-tech components, carbon fiber frames, computerized servos, closed network drive trains, specialized outfits all focused on Pro Bikes and Riders (aka: commercial) spawned a new consumer trend... consumer to commercial, driving consumer... differnt marketing perspective.
Although, if drone market is a consumer market, then Yuneec may have a problem when you compare the flood of competition product and their current response time.
Looping back to the top... I'd like to see the H520 & H-Plus succeed, hopefully the last few years don't represent the outcome. For now I'll have a little of both brands.
