Being an old "iron belly" owner, I have no clue what an "EMS light" might be, and Google's no help. Still, at just 750 miles, she's hardly broken in yet. As she gets a few more miles under her belt, one imagines she might limber up a bit...so barring some electro-gremlin in play, maybe the idling will improve with some more road under her wheels.
One thing I might suggest, especially since it's a 7 hour slog for you to the dealer anyhow, is that you also have them change the oil, even if it's not yet "officially" called for. I cannot say if it may be the case with the new Himalayans, but recent new User Manual "guidance" from the factory for 2018 Euro4-compliant Bullets concerning oil changes at 300 miles, and then only again at 4,000 (that's not a typo) strikes me as feckless in the extreme. I suspect some ill-considered enviro-mandate is in play there. If your lovely new Himalayan has some similar new factory recommendation to hold that gritty elderly spew in your crankcase long after it really should have been refreshed, just to please some distant Council of Enviro-Boffins, I expect you'd do well to disregard them and sneak in an extra oil change or three as you run her in.
Anyhow, I'm really rooting for you and all the other early adopters of this new chapter of offerings.