Just for the record, I don't think seeing the hotel (from anywhere) is an issue at all, personally. I know that's what triggered this argument a week or two ago, but it shouldn't be used to represent the whole "who can see what from where?" conversation.
My personal guide is that if something is themed and intended to be seen as front-of-house, on-stage "show" from anywhere, I don't mind seeing it from anywhere. It's the intrusion of truly backstage elements (with/and un- or minimally-themed buildings and industrial access areas) that I have much less tolerance for.
No park is perfect in these regards (except maybe DisneySea; it looks like almost everything inside the park is themed 360-degrees if guests have vantage points to see it from 360-degrees), and even weaker areas in a park don't sink the entire park experience as a whole.
But, obviously, Epic is new, was built without significant footprint constraints, and has been hailed by the company itself as "game-changing" and featuring a new standard for "immersion." What that means will vary for every individual, but for me... it basically means we should be expecting the most highly and fully-themed park in Orlando. So if my eventual critiques about sightlines read as (potentially) harsh (and I don't know that will be the case, as I haven't seen anything from ground-level in the park yet, and I will offer no concrete critiques until I personally visit), it will only be because Universal told me I could hold it to the highest standard.
It's also perfectly possible (likely, in fact), that I will still love the park even with said possible issues.