I feel like you might get away with some of those problems if you played a second copy or maybe 1 more afterwards. Even if you lead with Shuckle, you'd have a second one to use for it's ability, and having a second copy will not only greatly increase your chances of not prizing it, but you're gonna have more chances to draw it raw even if it is slight. You wouldn't even have to play both of them, just play 1 and discard the other through other methods.
Not to say you're completely wrong. For one, it has limited search options ergo not searchable by Mysterious Treasure (in which GRI Orcorio can be searched), secondly it is taken bench space, and in a deck involving Malamar (which I would know so now that I'm playing the deck a lot), you not only want all the space you can for your Malamars and attackers, but for an emergency Lele as well. It's no gift from the gods to Malamar (To Rayquaza, totally. But Malamar wouldn't need it), but we are losing Sycamore and Professor's Letter to help find a way to get basic energies into our discard pile for stuff like Malamar and do it all in a turn or 2. For Malamar variants, I'd personally at least try it, even if the chances of it working are lower than expected. Just here to list the positives of using the card in this particular scenario.