Guys, guys, guys, please, stop suggesting using anything but Mega Absol. Regular Absol is always inferior to its Mega counterpart; The whole "high/always crit" gimmick of Super Luck + Scope Lens just isn't worthwhile when you could be running Absolite and become faster (very important on a glass cannon like Absol) and get one of the best abilities in the game.
Stop suggesting this gimmick, please. It's really terrible.
To be fair, Absolite may not be permitted in RU so non-Absolite sets could be compared against each other to decide on different choices for RU Absol (whether Lens or Band or Scarf or LO or whatever is better for use on what teams, which moves to use, etc), or for any Absol set in basically the tier below where Absolite is permitted and below. In this case, such discussion could reasonably take place here since the new critical mechanics result in the new set.
I mean in OU, sure, since Absol without Absolite just doesn't have the speed to compete there and having a teamslot dedicated to only attacking guaranteed slow opponents (who, being in OU, will likely have enough defenses to avoid an OHKO and be able to either OHKO or status cripple in return, with the latter case being reflected by Magic Bounce in the case of Mega Absol) probably isn't worthwhile, so running the set in any tier where Absolite is permitted would probably (see below) count as a gimmick set since it either fails to achieve the OHKO it needs and then gets mangled, or fails to outspeed (Sucker Punch lacks a high crit rate, so no dice on that either).
This means it only outperforms Mega Absol on the first turn it spends in play if no status move is used (since Mega Absol fails to benefit from the increased Speed at this point), if Absol forces a switch (since everything but attacking power is irrelevant in this case, and the lens does cause you to hit harder), and against slower Defense boosters (Bulk Up/Curse/Cosmic Power, although the last one is usually used alongside Stored Power which Absol is immune to anyway) who lack a priority option to take Absol out with, and these are very rare. If such boosters saw an increase in usage the set might gain a niche role in countering them, but presumably they are currently obscure enough that countering them is seen as a gimmick use.
Similarly if other specific circumstances arose (e.g. a common Mega Absol counter worked by switching in with Intimidate to avoid damage and threaten, which a critical-based set would bypass, allowing it to function as an effective lure) then the set could potentially have merit, but I guess I'm willing to accept that in the general case Mega Absol will outperform Scope Lens Absol for the majority of applications, simply because of the sheer number of pokemon that occupy the speed gap between the two coupled with the number of pokemon with status moves Absol doesn't like. (Hopefully these paragraphs explain to anyone else suggesting scope lens in a higher tier like I originally was why it's not such a great idea).
However, tiers will probably exist where Absolite is banned but Absol itself is not, making a scope lens build a potentially interesting option (with the boosters it will be used to counter having lower Speed and/or lower offenses due to the decreased tier, and there being less disadvantage to running it over other sets: While the two currently listed in B/W RU have improved coverage, netting key KOs or slaying specific boosting/intimidating mons might make the scope lens worth considering). Thus I don't see any reason why Scope Lens Absol shouldn't be considered against other traditional existing Absol sets for tiers where Absolite is not permitted.
In summary: Very specific metagame conditions would be required to give Scope Lens Absol a look-in for any tier in which Absolite is permitted (specifically, it would have to score multiple key KOs on common opponents, effectively nail common Mega Absol switch-ins, or deal with common boosting pokemon), and while this isn't completely impossible it's unlikely and definitely not worth discussing until we see more of how the metagame shapes up and have a better idea of what, exactly, people will be switching in to a pre-mega-evolved Absol. However, comparison with existing Absol sets for lower tier application might still be an interesting discussion topic given the number of Intimidate switch-ins in the lower tiers, the higher prevalence of Curse boosters that lack Mach Punch, and the larger number of slower pokemon that have the defenses to cop a Life Orb hit in relative safety, but not a Scope Lens one. As such, I think at least a post from someone more experienced explaining why Scope Lens Absol will be inferior to even current Absol builds in too many situations to be worth considering when Mega Absol is not an option. Apologies for the initial suggestion of it as a competitor to Mega Absol, it's relatively clear that it'll only be able to do that in very specific metagame circumstances that are unlikely to arise.