What about the end game content? (spoilers and burning) (Valkyrie Elysium)

So I went through the game on medium difficulty ..... and then what?
Like there is no new game +, the game offers to go through unfinished missions (if any are left), to complete the flowers (it’s not at all clear why, if only for achievement in the incentive), one of the two bonus modes invites me to go through the arena from "some " floors to .... get a spell for an already completed game and that's ALL? for 3.5k ever-wooden? maybe I'm stupid or misunderstood something?
Well, yes, Hilda's Revenge, there are still five missions for another Persian with other weapons and, by the way, this weapon has very interesting mechanics (well, yes, yes, yes, press the buttons in the timings, but by the way, in the main game it wasn’t even there! ) and everything? no bonus weapons/spells for you for passing on high difficulties, no costumes or anything at all?

Tell me, did it really break through the bottom, or am I a fool and didn’t see something?