Actually, I have been one of the most optimistic posters on this board for many years; I've caught grief and ridicule many times for it. Sorry I'm not celebrating the departure of one of our experienced players and just blithely assuming his spot will be filled by a better player.
How so? Among our starters, Goldwire and Harkless are now gone. There's a good chance Mo will be too, and you can throw in Chargois as a key contributor, too (though not a starter). That would mean our only returning starters will be T-Groves, whom many posters here are hoping to see relegated to a backup role, and Hill.
Moser actually had more returning starters entering last season than this (or just as many, if Mo sticks around). We do have three freshman coming in this season, but they will be freshmen--expecting big contributions from them is asking a lot (no one will be happier than me if one or more of them arrives ready to shine at the D1 level).
As for your point that Coach Moser, who was hired on April 2, had no time to get good players: Moser's challenge was far from uniquely difficult. Beard, who was hired at texas on April 1, lost seven players to the draft and/or the portal; he brought in seven guys from the portal, six of whom were ranked among ESPN's top 31 portal transfers.
Adams--a first-time head coach who was hired four days after Moser--also had more slots to fill. He brought in nine players from the portal.
That said, it's just one season, but I keep seeing texas and Tech cited in these portal announcement tweets as schools who are in the hunt -- I'm rarely seeing Oklahoma mentioned. I'm not panicking. I'll of course let it play out. But we need to make a BIG leap in our portal success this time.