Seems nice. I just wish it had removable battery, like phones used to, so I could carry a spare around, like I used to with Sony Ericsson W200i.
Also dedicated dual SIM + MicroSD instead of hybrid.
Just got an idea, the Galaxy Flip has 2 batteries. Small one, and large one. What if there was a small one built-in, and a larger swappable one. You could then hot-swap the batteries like with some ThinkPads (those with internal + external battery).
Unfortunately making the battery removable will make the phone considerably thicker and probably easier to break which is not what most of the users want
The Galaxy S5 was the last of the mainline series to have a removable battery, and was thinner than the S9 which came out four years later. It also had a pretty good water resistance rating.
Any "downsides" to a replaceable battery are a myth.