The thought process for making this card was basically:
"
What if TPCi realased a a special promo card today that still interacts with V-STAR Pokémon (Not only just Rule-box Pokémon) as a sort of "farewell" to the V format?" and "
Why is Eternal Flower Floette is still not playable in any sort of media?"
I'm a big fan of Pokémon that never got to the actual cut, and Eternal Flower Floette is the only one that technically made the cut, but never has been realased in a official way, but GF has always updated data related to it.
In-lore, I think relating Eternal Flower Floette and VSTAR Powers is very fitting, considering its background story with the Definitive Weapon and Mega-Evolution.
Light of Hope uses a common disadvantage state in this format (specially with the popularity of Arceus V engine) as a way to enable
Starfall Gleam, a free 90 damage attack on a 70 HP (just as the other Stage 1 Floette cards already printed) [P] Basic , that can also search your own V-STAR Pokémon and put it into your hand. This is clearly a comeback-designed card, but you can also use it as a offensive early-game counter card for decks that don't use V-STAR Powers but they have a rough matchup with deck that they do. You could also run it on decks that rely on VSTAR as a ditto counter card for moments that your opponent has used its VSTAR before you and you can't search your own VSTAR Pokémon normally, but it would be more niche.
With cards like Choice Belt, you could buff its damage up to 120, that would 2HKO every V or Basic ex on this format, valuable but not broken.
I could see this card in decks like Gardevoir or United Wings with 1 copy on each deck, since they don't rely too much on VSTAR Powers.
TL;DR:
TPCi hates AZ.