020 Dr. McCoy
TO HELL WITH YOUR LOGIC, MR. SPOCK... SOMETIMES A MAN JUST HAS TO FOLLOW HIS GUT AND TAKE A CHANCEPage 15, Rule Book
ROLLING 2 AND 12: CRITICAL MISSES AND
CRITICAL HITS
Dr. McCoy uses his effect to make friendly character attack rolls 10-12 a critical hit. If that same friendly needed a 11 to hit a opposing character, but rolls a 10, does this "special" critical hit count as a hit? Before, I remember older rulings (before 2017 rules) where characters only got increased dealt damage from game effects giving "critical hits", and nothing else.

Yes. The important part of McCoy's power is in the last part you quoted.
...all targets of the attack become hit, even if the attack total would normally miss one or more of the targets. This is called a critical hit. A critical hit increases the damage dealt by 1 to each hit target when dealing damage.

I can't say I ever heard of a power that refers to a critical hit not automatically hitting as well as giving the extra damage... do you know which figure it was on?

Yes, it would still hit due to being a critical.

As for the old ruling, you may be thinking of the "attack rolls of X that hit count as critical hits", which is something that mostly came up with TMT and various pieces of Equipment. In those cases, the attack roll has to already be considered a hit before it becomes a crit, so it really only get the damage increase, not the automatic hit.