Those factors dont seem to apply here
If no card is exiled with this artifact, it can't add mana
All you need to do is start
While this is a pretty reasonable argument, it's also true that, at least as far as Standard is concerned, the most game-winning things to cheat into play are creatures, which makes Thran Temporal Gateway pretty similar to Amulet, with the upside of hitting weird permanents but evened out by the downside of not putting non-legendary creatures into play
We are also working on better handholding to get players into their first game, a revision and rebalancing of the Super Jump half-decks, video tutorial content, and some larger game-wide swings that will improve life for all players, not just new players
Of course, some of your opponents might not be too thrilled about you playing mass land destruction, so this one might necessitate a Rule 0 conversation