C'mon, with just a bit more than half the focal length and only half the aperture area, that's not quite in the same league.
Yes, there are a lot of features that I'm missing with the Seestar App: Mosaic, scheduler (plan), arbitrary coordinate input (yikes!! how can you not offer this??), more flexible exposure time and gain settings to name a few. You can whine about it, but luckily there are people who do something about it. A bit of googling will lead you to github projects of people who write third-party control software for the S50 that make all of the above possible.
I've seen the same thing for drones (from DJI in my case). While their stock remote controller app was ok, third party software added some interesting features, and if anything DJI sold more drones, not fewer, because of this. I hope ZWO will take a similar, open approach towards third party s/w. It's a win-win situation, except, perhaps, for the fact that now ZWO will probably no longer be able to sell a "PRO-version" of the app if they ever intended, because there will be community developed s/w with "pro" features for free.
HB