You strike an almost apologetic tone at the end, so let me start there: Don’t be silly! Express away! As a reader, your opinion is always valid. And as an aspiring writer, you bring a writer’s perspective to that opinion. In this case, you could be right — and you certainly aren’t wrong. The question of first person compared to third person comes up for every book. There are strengths and limitations to each approach. I’ve written books from both perspectives, though I don’t think I often analyze it too deeply. It’s more of a feeling, I guess. Some books seem right from the first-person perspective — you hear it coming from a very specific voice — and you want that character front and center all the way through. In other books, well, not so much. For some books, I’ve even tried it both ways in early drafts, exploring the differences. There are certain freedoms in a third-person narrative that are not available in the first person. And also, I’ll confess, I come across so many YA novels that are written in the first person that I get very, very tired of it. The writing in a first-person book, depending upon that character, tends to be looser, more informal, the way people really talk. As an extension, that perspective limits the syntax available to language that character would believably use. With first person, there are places you can’t go.
In a scary story I recently wrote for younger readers, I needed the third person to pull it off. I wanted to write about my human characters, but later I wanted to go deep into the swamp and reveal more of the swamp monster. Part of the suspense in the story is that, for a time, only the reader realizes there’s a monster in the woods. To the three children in the book, well, they are just walking deeper into the woods. They don’t know what they are getting into — but the reader does. You see the difference there?
Third person is an art which some people can’t wrap their stories around correctly to get such personality from the characters without blatantly spelling it out. You have that talent. Sticking close to Eric’s point of view, like you do, provides the third person flare while contributing glimpses of first person to the story. I am only human though and, personally, think, still, that first person may have been a better choice, but, as you said, there are reasons why you decided this for your story. It was a calling of sorts. For example, if you were to use a first person POV for this book (or any piece of writing really) you would have less ‘tag’ lines, as I call them, to describe who was talking. Especially the main character. Having less use of words ties you down as writer and limits, as you said, how you can write your story.