I can’t say for sure, but just look at the numbers. 
The classic app
Had around 1 million downloads
8,000 reviews
2.8 rating
The new V3 app
Over 100 million downloads
536,000 reviews
4.5 rating
This forum has about 86,000 users.
The new app isn’t aimed at us. “Us“ being power users of the smartthings hub.
It’s aimed at the literally tens of millions of Samsung customers with smart televisions and smart appliances.
SmartThings employees have said multiple times in this forum that their typical customer has 15 or fewer devices and uses no custom code of any kind.
With the exception of Geopresence, it’s likely that nothing broken in the migration affected that group at all.
Again, I’m sure that the individual smartthings employees who visit this forum (and many more) would really like to keep the power users happy. But when it comes to the Samsung business model, we are barely a blip.