If you want to be "factual" (which is I guess your attempt to make it seem like it's reasonable to extrapolate anything from a 3 game sample size) let's look at him relative to players with the same sample size this season, to elminate one hit wonders as it were in either direction.
Of the 12 goalies who have played 3 games, his GAA ranks 7th and save percentage ranks 8th. His GAA .004 and his SP is .005 behind Markstrom, who is 6th on both lists and thus techically "above average" (ordinally at least). Given the slightness of those deviations it's safe to say he's comfortably in that average range for techincally comparable goaltenders.
To further point out the inanity of trying to extrapolate via these sample sizes, notice that his save percentage and GAA are better than 2 other notable goalies who have played 3 games this season: Saros who has .887 SP and 3.41 GAA, and Hellybuck who has a .883 SP and 4.38 GAA. Guess those guys clearly need to be in the minors too /s.
Furthermore, his numbers don't really need to look like any those of other goalies to be a positive for Buffalo, especially when most teams aren't likely to score at the rate we can reasobaly expect the Sabres to, and several of those teams play much more goalie friendly systems. Consistently in the ballpark of average would be a notable improvement.
I would have made some different choices if I were GM in terms of goalie support, but Levi has been far from a problem thus far this year.
And, please, get out of here with that garbage about seeing more Levi than all of us combined. Look through the thread, there were plenty of people on this board that regularly watched his games.