Actually, scratch that. In Ubers anyway, thanks to Blaziken not taking LO recoil, (the added defense doesn't mean shit btw) Blaziken now might be able to defeat Extremekiller Arceus 1v1. Extremespeed does a max of 83.11 to Mega Blaziken, which isn't even an OHKO after rocks. No LO damage = no KO unless HJK misses or we use Flare Blitz and get recoil. And MegaBlaziken OHKOs back with HJKTrue, though for a lot of Pokemon Mega Stone vs Life Orb is a relevant discussion, Blaziken included.
edit: in addition, because of the increased speed and speed boost, MegaBlaziken can afford to run a nature besides Jolly. With Adamant, it barely outdamages its Life Orb counterpart while having higher speed and slightly higher defenses.