Yeah, that certainly tracks. It's like the designers went "hey, let's just throw all the good features into one subclass and see if anyone notices..."For me personally, it's not just that the Twilight Cleric comes with a very powerful package of abilities, but also that the fluff of the subclass is, on the whole, very broad, to the point of being essentially three or so different ideas packaged into one.
I mean the 8th level feature is divine strikes, which allows you to add 1d8 to a melee attack. It's not even that it's that powerful, it's just another thing that some cleric subclasses get that this one gets too - because why not.