I'm actually not sure I agree. Daredevil doesn't change the difficulty of a maneuver, it just sets/states a maneuver. I suspect that the intent is that the maneuver remain red, but I don't really see anything that would keep R2 from making it green…
But that is not what the FAQ is stating. The answer is regarding the original question of two opposing effects. The FAQ does not say wether that effect comes from a pilot ability, a damage card, or an upgrade card, or some other way to generate an effect or whether it creates or modifies something.
If one effect makes a green and one effect makes a red (or white), the red trumps green.
I would rule that the daredevil card is creating a red effect (because it is an upgrade card and its text is allowing a red maneuver) and the R2 is creating a green effect (also an upgrade card and allowing green maneuvers), therefore the red effect trumps the green effect.
The FAQ uses the R2 and the Damaged Engine critical hit card as an example of when one has come up and how that one is to be ruled. The original question being asked is regarding two opposing effects, not where they came from, does it matter if one creates and annother modifies, or other intent.
Therefore, if two maneuvering effects are opposing in nature, red trumps green (also by this ruling white trumps green).
Note that a maneuver dial has white maneuvers but is covered in general rules and the R2 is a specific upgrade card. Under Breaking the Rules on p. 20 "Some abilities on cards conflict with the general rules. In case of a conflict, card text overides the general rules". So the R2 would trump the white maneuver dial maneuvers (card over general) but not upgrade card white maneuvers (white card abilities trump green card abilities).
Rebels: 5 X-Wing, 4 Y-Wing, 4 A-Wing, 2 Yt-1300, 3 B-wing, 3 HWK-290, 3 Z-95, 1 E-wing, 1 CR 75
Empire: 6 Tie Fighters, 6 Tie Interceptors (1- 181st, 1- RG), 2 Tie Advanced, 2 Firesprays, 4 Tie Bombers,
2 Lambda, 1 Tie Phantom, 1 Defender
Tournament results: 11 of 11; 3 of 11;(AoIA)2 of 3; 12 of 28