I'm probably stretching, but as soon as I realized Jay-Den was a birdwatcher I wondered if that was a subtle tribute to Chris Cooper, writer of the Marvel Starfleet Academy series and host of Extraordinary Birder. (Cooper became briefly very well-known in 2020 when a woman called the police on him while he was birdwatching.)
https://en.wikipedia.org/wiki/Christian_Cooper
I haven't spotted it myself, but multiple reviews have mentioned the wall includes a mention of Peter David, creator of the Brikar, who first appeared in Star Trek: The Next Generation—Starfleet Academy: Worf's First Adventure, the first licensed novel (or YA novella really) based around Starfleet Academy. That was probably visible in episode #2, but I'll note it here because
- It's a standing set.
- It pairs well with the possible Chris Cooper allusion.
David was mentioned as being on the wall at https://nerdist.com/article/starfleet-academy-wall-of-honor-star-trek-easter-eggs/ and https://comicbook.com/tv-shows/list/every-star-trek-easter-egg-reference-in-starfleet-academys-first-2-episodes/.
I've been doing a rewatch and making notes of things that are referenced later. Considering most classic Trek has a reputation for being episodic, you'd be surprised just how much gets referenced later, whether in a passing comment or an in-joke or something. The only episodes of TNG season 1 where I didn't spot at least a passing reference later was "Too Short a Season", "Home Soil", and "When the Bough Breaks". (The references to a few of the others are vague and/or arguable though, and admittedly "Knowing where that clip in 'Shades of Gray' is from" qualifies a few of them.)
So it kind of depends on how strictly you define "important." Most people could probably skip almost the entirety of TNG season 1 and not be that confused, but for example:
I could add other subtler things, but those are some of the bigger ones just from that highly-episodic season.