Unfortunately some of these decisions are made based on market needs and believe it or not, surveys and usage data. Features that don't make the cut into new iterations were either too buggy or not used enough to justify costs. On commercial applications, map providers get a cut for displaying their information in someone else's page (in this case, HERE maps into Samsung's Find My Mobile). I assume street view is less expensive than offering all layers, and if their usage stats show that more users just use street view, then it makes financial sense to remove the feature, even if it may seem like a bad move to some.
SD card was removed because Android was moving that way, until they didn't and re-added full support in Marshmallow (plus, SD cards are highly unreliable and too slow compared to internal memory). Battery was sacrificed in lieu of thinness, and that was mostly a business move. I, for once, haven't missed either. Never really needed an SD card (and now that media backups are free in Google Photos, even less) and my Note 5 makes it through the day on a single charge (if it doesn't, I always seem to have a charger around and quickly charge at least 50% in a few minutes). For those vacation days of taking a lot of pictures/video, it's easier/cheaper to get a portable battery pack than getting a new phone battery.