And there's a good reason for that. Rogues are fine as it is, they don't need buffs. They are not weak in combat by any means.
What does that even mean, "not weak"?
Compared to what? What classes do you consider weaker?
Myself, I consider melee Rogues to be one of the riskier, most fragile, and therefore weaker build choice. Just going fighter with a sneaky background and Stealth is better - most of the time you won't even miss Rogue specific abilities. The ranged Rogue is better than the melee build, but if you want to stay at range, why not go Ranger/Fighter and pick up Crossbow Expert.
No matter how you look at it, Rogues are one of the classes paying the most combat power for out of combat utility, and that's a shame.
Giving them Extra Attack would be Maximizing their damage output. Is that clear enough for you?
Maximizing damage output is good, that's exactly what the Rogue class needs.
I do agree Extra Attack is not the way to do it, though. That way, it just makes the Rogue a poor-man's martial.
Much better to observe what the rules already do give all Rogues, and instead simplify and streamline access to that: two Sneak Attacks every round.
That way we're not actually boosting the class, we're just making the game more user-friendly and inviting. No longer do you need to be a minmaxer cheesing out specific rules to play a Rogue with competitive DPS!
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