Certainly missing nuance, at the very least. Off the top of my head:
DARs, when a WPS doesn’t proc, are 50% double hit, 25% main hand, 25% off hand.
Cadence replaces exactly one hit with the big hit when charged. A non-WPS dual wield attack will be 550% with one hand (usually main hand) and 100% with the other hand. In some cases this can also replace one hit of a WPS. For example, an AQC+Cadence attack will have one Cadence hit and two regular AQC hits, or Execution+Cadence will have one Cadence hit and one regular Execution hit.
Other DARs and WPS multiply their weapon damage together. Savagery/RF type’s charge bonus is another multiplier on top of that. If nothing else, common breakpoints should be listed at full charge - 186.3% @ 26/16 Savagery, 179.4% @ 24/16 RF, 162% at 16/16 for either.
Speaking of AQC, it’s two hits with one weapon and one hit with the other.
Chilling Rounds shoots 3 times with one weapon, 4 times with dual wielding.
Storm Spread fires twice no matter how many weapons you’re wielding. Should list all breakpoints - 6x33% @ 1pt, 8x36% @ 7pt, 8x43% @ 20pt.
Occultist’s Blood Burst is missing. It attacks with the main hand 60% of the time and off hand 40% of the time, even with a caster offhand or two-handed weapon, in which case the base weapon damage is 0 but it still gets flat damage bonuses. PRM (and other skills with the same cast animation, as far as I know) do the same if weapon damage is added.