Stoutstien
lunk
The effect is pretty minor when compared to other save spells.
The concentration really kills it. There are better spells at all levels to be concentrating on. Ones that will actually take away from enemy creature's actions and other nasty effects.
Upcasting it just makes it worse.
Multiple healing potions can be purchased.
After the first few levels the cost is quite minor.
If long rests are easy to come by then all spells are fine. There will be little challenge anyway so it doesn't matter if a spell is good or not.
Upcasting Cure Wounds just makes it worse. Compare it to the spells at those higher levels.
100% Dm dependent outside of AL. Even most of the published campaigns have limited access to them. this is expececaly true for the lower level where healing effects are most likely to be needed. not to mention the cost factor.
a better comparison would be a healer kit and the feat compared to the spells because at least it could be acquired earlier or with starting gold.