The Card Trader's inventory has been updated with some new additions to his card pool.
Top Player Council Opinions
superforms says:
Loading... only really has synergy with Bujins at the moment, and I don't think they'd run him.
Loading... has potential in future Plant decks because it seems like a really nice semi-boss monster in a consistent, swarming Plant deck with other 1-tribute monsters (so that Loading... could be used), which we don't have yet.
Loading... * is a very interesting card that's actually limited in the TCG despite the fact that we're getting it with the same consistency (60-card TCG decks ran 3x Loading... + 3x Searchers for it; we can just do 3x Grass in a 30-card deck). Grass fuels graveyard combos but likely requires you to play 25-30 cards, which means that your deck needs to be able to run without it. Obvious candidates include Red-Eyes Zombies and Magnets, but so is anything that special summons based on graveyard conditions - think Loading... , Loading... , Loading... , Loading... , Loading... , etc. In the TCG, Loading... was abused with the "Infernoid" archetype which is full of those kind of monsters and consistent even without Loading... . Anything similar to this that makes its way to Duel Links should have a lot of synergy with it.
Kazin_X says:
Loading... 's implication is too far reaching, probably useful for many archetypes in the future... Currently though, it can be good for Loading... to fill the graveyard with things like Loading... , Loading... , Loading... , Loading... , Loading... , and much more. Exodia can probably do some stupid stuff like use Loading... to mill, and then use Loading... . Plants can benefit from it too, by dumping Loading... and doing a very quick swarm. I guess Zombies, especially Red-Eyes Zombies can benefit, but I don't want to mention things superforms already mentioned.
Tutpup says:
Loading... is not very impressive. Could see play if Bujins become meta, but even then I don't think most Bujin decks are going to want to waste a normal summon on this card.
Loading... : The current plant decks we have doesn't really synergize with "LP Gain", so I don't think this card is going to see play. Maybe in some YouTube decks, but at first glance without looking into specific cards in the game that might synergize with it, I would say this is not going to see any real play.
The exact impact Loading... is going to have is hard to predict. We have already seen people like Billy Brake play Loading... in his Red-Eyes Zombie deck and have great results with it. I think Loading... is going to advance decks that play with the graveyard to the next level, i.e. Loading... decks, Loading... decks, Bujin Decks, etc.
Summary
Loading... and Loading... don't seem to have any immediate impact on any top-tier decks. They might see play in future archetypes yet to be released.
Loading... is very exciting, mostly for decks we will eventually see in the future, but also for certain top-tier competitive decks right now. It may see play in Red-Eyes Zombies and Red-Eyes Slash Dragon. It may also push decks like Bujins, Plants, graveyard banishers and others to competitive status.