It's interesting that they don't talk about Galandriel as the Old One. A lot of that sort of cultural context is missing in the Elven Culture, even though it should be obvious amongst the nearly immortal species.
I imagine that there are whispers and sometimes quite loud arguments amongst themselves, and the ambition to prove themselves would be very present with the young ones. All the other races takes the ageing pretty normally and sometimes understands that physical weakness increases while the wisdom increases in most people.
I liked that they showed an elf with not a perfect hair, because just like the overweight and depressed elves are amongst the population, those with the bad hair day should also be a thing. And yet, especially in the Tolkien world, they are forever young, even if the context relays that they are actually ancient.
The funny thing is that when the LOTR happens, there are elves in the middle-earth that has never been to Numereon or even seen the light of the Undying Lands. In that context, Jackson's films showed beautifully their dying wish to see the Ancestor Lands. But that is pretty much it.
If I understand the series right, the situation is opposite and the Elves wants to explore Middle-Earth and see how rounds the globe really is. It is kind of sad that we know there's much more to Middle-Earth and its celestial companions, but Tolkien never really had time to show us the whole map or the surrounding space-system.
In that context, the astronomer hobbit is a really intriguing character, as it can possibly reveal us more about the Tolkien universe than we've known before ... if we accept it.
This might end up being a very interesting series .