Exactly.
While telepathic communication is certainly an ability open to the elves (the essay in question is
Osanwe-kenta), we will be using it only sparingly onscreen. We will either have to give it limits of distance, make it something only certain people can do, or keep it very unclear how and why it can be used.
Because if all elves can communicate telepathically with one another at all times, then we might as well have given everyone a palantir. And that would wreck havoc on multiple storylines (even if they are able to block out Morgoth, which....)
We likely will show Galadriel develop her telepathic ability after her time with Melian. And thus it will look like a skill that she can have (or at least have to a much greater extent) while other elves do not.
Finrod will have to demonstrate some mind-reading abilities when he meets Men, but that might not be something we introduce much before that. Or, he may have only communicated long distance with Galadriel or something.
Which means, for the current situation, we may want to show Melian communicating with Thingol about the surprise attack.