Er.. what? How exactly is that a convincing sell?
Look, since you seem to think having to "spend 1 more ability point" isn't a big deal, then let's just keep things as they are and let the Rogues continue to spend 1 more ability point (rather than trying to pass that burden on to the Rangers).
I sense a little bias in that claim. I can't think of a single class that couldn't use some extra points.
Ever heard of Sneak, Pickpocket, and Lockpicking? Those are traditional Rogue skills, not Ranger skills. Rangers in this game take things like Crafting and Loremaster because they don't need points elsewhere as badly as other classes.
Sure, because all Rangers take Crafting and Loremaster only (if at all). I guess that's a rule that's set in stone somewhere in an otherwise classless game? They couldn't possibly want Sneak, Pickpocket, or Lockpicking for themselves, or Bartering, Charisma, Leadership, and Lucky Charm, or even Dual Wielding or Two-Handed Sword use in addition to Bows. Because there have never been Ranger concepts with those skills before, right?
What I'm getting from this conversation is that you have your own personal opinion on the skills a Ranger should take, and going by your concept a Ranger has plenty of points to spare (unlike your idea of a Rogue). Meanwhile, other people are trying to build their own version of a Ranger and (unlike your concept) falling horribly short because there aren't enough points to build their vision.
And so I'll say it again - all potential builds are struggling for points. Making a talent more accessible to Rogues at the cost of making it less accessible to Rangers just because you want a spare point for your Rogue build isn't a good argument. And trying to play it off like it's "just one more point" that Rangers can afford to suck up when Rogues can't is silly.
As is pretending that "Avoid Opportunists" isn't a useful talent for Rangers. Honestly, I'm sure every build would enjoy having this talent. However, Rangers simply can not afford to have random opponents in their face and blocking their line of sight if they want to have a clear shot at other targets on the battlefield. If Rangers want to continue using their bows effectively, then they must withdraw when an opponent closes on them, and I feel that is why this particular talent makes more sense in requiring Expert Marksman rather than Scoundrel.
Simply put, Rangers should be good at putting distance between themselves and their opponents without exposing themselves to danger (i.e. attacks of opportunity) every time they move. Your stereotypical Rogue, on the other hand, is nimble and quick - and there are other ways to represent that - but being adept at dodging is NOT the same thing as being able to withdraw from melee range without leaving ones self open to attack. You want to be able to duck in and out of melee range without risk. That's overpowered. Where as Rangers just want to be able to get out of melee range and stay out because they typically don't belong there.