I kinda disagree, I think with some time Blaziken will be at the top of the viability rankings. Regular Blaziken has been so good since bank dropped, and adding the mega to the mix just makes it better. +1 base 100 speed is soooo much better than 80, now you can outspeed Lele after one boost and bop it, you can run Adamant instead of Jolly and outspeed Mega Gengar / Tapu Koko. Hell, Adamant even outspeeds max speed Pheromosa after one boost! It won't break walls as well as Z move Blaziken, but it takes care of offensive teams so much better as a Mega. If anything, I think Mega Blaziken is more threatening this gen than it was in ORAS, and it was a pain back then too.