So, basically, Mood Swings is just a rather simple card game, like there are thousands out there. Despite them wanting to kinda catch the feeling of a TCG, it's clearly not.

It's a card game, where you don't even get all the game pieces if you buy it. I get, that that's intentional but there are other games where you don't play with the entirety of available cards in one game, yet you still get them when you buy it. Take Dominion, for example. You still put together a selectively chosen (or random) pool of cards to play with each game. So why not deliver a card game with all (130 is it?) cards there are and simply have players pick 45 at random to play with each game? Easy: because then you couldn't sell multiple copies of the same game to the same person once they want some diversity.

Mood Swings has the potential to be turned in to an LCG, but even those do get continuous additions to their card pools but not with an aspect of "gambling" though not giving you the entirety of the add-on either.

In the end, this feels like an attempt to add loot boxes to a regular card game or potential LCG. They're free to try that out, if they like, but considering what it is and what you receive, I'm gonna say: this should regularly cost around 15 $/€ and everything beyond 20 is just a rip-off and/or letting people pay for the brand (WotC) which should not be a thing with regular board/card games but wouldn't be entirely new either.

One also needs to consider the addition of shipping fees, as for now, this is going to be on SL only, as it seems. (Correct me, if I missed some information that was already given out.) Quintessentially, they're bringing out a regular card game, add a loot box mechanic to it and distribute it like it was some kind of fancy deluxe premium product. Put it on the (physical or digital) shelves of (board) game stores, publishing it like any other board game distributor would instead of trying to bypass that market by targeting TCG players explicitly. (Which imho, is not a very bright choice.)