It's one point less and won't actually always be useful, either. Wedge's only two options are focus and TL, and if he target locks, predator won't be used. With focus, each die has a 75% chance of hitting anyway. It's not about how much average damage you do, btw, it's about maximizing it. Xwings have green one forward and banks, so keeping a ship in their arc isn't tough.
...which is why Wedge with Predator will always take Focus as his action, rather than Target Lock. Best of both worlds.
Your second point is highly debatable as well, since Predator helps Wedge maximise ACTUAL damage output every time he opens fire. Opportunist helps Wedge maximise POTENTIAL damage output, at the cost of stress, provided the target has no defense tokens. There's a big difference between the two.
As for green one forward and green one banks helping you keep ships in arc - if that's what you're relying on, be prepared to find Imperial ships on your six, very quickly.
Listen, if you want to argue that Predator is better overall than opportunist in general for Wedge, I'd agree and your points are the same ones I'd make in general. In this list, with Wes where you can take Opportunist when you want it and you need to hit hard fast and early? It doesn't.
Here's a table of hit probabilities: http://boardgamegeek.com/thread/915146/math-wing-hit-probabilities
Provided I'm reading it right, once you are looking to get at least two hits 4 dice with target lock OR focus (IE opportunist) is at worst comparable to 3 dice with BOTH focus and target lock, (IE predator approximation) and opportunist is significantly better the higher the target's agility. Of course, predator is one only one reroll and not a full target lock, so I think it's pretty clear that opportunist is going to hit harder both on average, and obviously, potentially. The only situations where predator is definitely better, provided I'm reading it right, are in the fact that it has a higher chance of getting a single hit and is probably roughly equivalent at getting two hits on agility one (or less) targets. In this list, especially with Abaht, you don't want to nickel and dime, you want to obliterate ships.
Red winter summed up my points about the green ones, so I won't go into detail there.
Edited by AlexW