Made some measurements:
Everything is within normal range except 80m, 17m and 12m.
12m and 17m can’t be fixed easily because they share a common LPF — 17m/15m share one filter and 12m/10m share another. This kind of discrepancy is a common downside of shared LPFs (at least for filters built by me 🙂 ).
What’s funny difference between «normal» and WARC bands on the common filters almost identical — within the margin of error — 7% for 17m/15m and 8% for 12m/10m.
As for 80m, it needs some tuning to bring 80m efficiency closer to the 40m level.
But overall, even leaving it as-is, the efficiency of a Class AB HF amplifier looks pretty solid.