16.5 is a good average, but UVa's schedule was weaker than in the past.
20 against Lafayette and 21 against Quinnipiac and Air Force helped to push that average up. As did 20 and 21 point games against an unnamed ACC team that struggled with its defense.
UVa did have a nice outing with Brown scoring 17, but had 8 vs Duke, 9 and 12 vs UMd, 12 vs ND and 13 vs Richmond, which shows they struggled against better defenses. They also had games where they scored 11 versus High Point and UNC which shows more inconsistency. Not the numbers of a top notch offense.
i don't have any problem with how you view the hoos overarching stats, you're welcome of course to them. and there is some truth to some of it. they didn't have game to game consistency, and that was going to bite them eventually, but mostly bc their d was less consistent. imo.
again, they were one of the leaders (3rd or 4th?) in goals. edit- it was 15.5, not 16.5. just about every team ever has a dispersion, bumped with weaker teams. and games they didn't hit average, that's math.
and your examples... one unc game was a lower scoring game, sometimes you don't need to push for goals in that deal. they won by 7. richmond, they had 7 first 1st quarter goals and then their fogo was in a sling. and moore pulled up i think early 2nd half. notre dame they were cruising and took foot off the gas, won comfortably it was never in doubt. what else? duke, that was right after richmond, they stunk everywhere but lasalla and moore not 100 didn't help. cuse may not have been a killer d but not many decent teams did to them what uva did thru 3 quarters.
that leaves mid-feb high point and umd games. high point has uva kryptonite, they're probably just lucky to win. maryland had a once in a generation juggernaut and uva came up small twice. to me, that was mostly d and faceoffs, but yeah... umd (2), high point and duke.
you'd typically want that number to be 2 not 4 (or 5 if you want to count getting boatraced by richmond for 3 quarters), but given umd was 2 of them it's not that bad.
on 7th guy stuff... almost no one ever gets the production that 2022 umd got out of 2-mf anymore. or scores 17 1/2 + game. brown 2016 maybe? i'd be shocked if 2023 umd does.
it's 6 guys and then others. uva had a number of guys at or around low double digits. they rotated maybe 5-6 guys for 2nd mid runs, so not surprising.
mcconvey brings in like 75 points from a midfielder (in a less competitive league). he's the impact player you're asking originally about. might be the biggest pickup for anyone this year, we'll see. also, it could've been just a couple good fall scrimmages, but mencke (redshirted) if he sees the field is slick and has a knack for piling points. plus garno probably rebounds as a shooter.
again, my personal view their offense is in a position to be in great shape. d is tbd.