Lucario outspeeds and KO's most Fire-types with Close Combat anyway, so EQ isn't really necessary. It's nice for Aegislash, but I would always run Crunch on Lucario to KO Gengar and deal with Trevenant & Gourgeist, who otherwise wall you entirely. It's also needed post-bank for Jellicent, Celebi, the Lati twins, and many others.
Yep the toss up would be between Crunch and Ice punch rather than EQ, seeing as Ice punch hits all of those guys almost as hard as Crunch with the exception of Gengar (where Crunch is clearly superior for guaranteeing the OHKO) and Jellicent (where Crunch is also obviously superior, but Jellicent is pretty uncommon nowadays), Crunch also hits the likes of Jirachi and Metagross harder (which to be fair, EQ does as well). Everyone else is hit similarly hard with both options. Ice punch has the advantage of handling Gliscor, Lando-T and the quad-weak dragons much better than Crunch does which is a pretty significant point in its favour now that Mega-Lucario has the speed to take advantage of it. Skarmory is not a consideration when CC hits much harder than Crunch anyway, and it's unlikely you're going to be staying in hitting it on anything other than the switch so the defense drop doesn't matter.
Overall, I'd lean towards Ice punch at the moment because Lando-T is God damn everywhere and switches in on Lucario all the fucking time, while Jirachi, Metagross and Jellicent are all dying in popularity. Of course it's a matter of team composition, but Ice Punch definitely seems more valuable atm in a vacuum.
I'm wondering if you guys think an attacker without Swords Dance could possibly be better (sorry if this already has been discussed/asked). This could give Lucario much better coverage, and Lucario still is pretty frail even when it's Mega-Evolved.
I actually think a SD-less late game cleaner/wallbreaker set has its uses. Lucario struggles to find opportunities to SD. Good players will do anything in their power, including saccing Pokemon to prevent your set up and the frail Lucario sometimes even finds Mega-evolving a chore to complete. Adaptability CC coming off 145 base attack hurts plenty without a damage boost, and in my experience, Lucario shines Late game with its switch-ins weakened, where it can just come in, and fire off 240BP CCs until the cows come home, ala Specs Latios.