I had a whole essay prepared on my gripes with this run, it got lost, so I'll give you the cliff notes version:
Brad Meltzer's Justice League suffers from 2 major problems:
1. Pacing. Meltzer's decompressed storytelling worked for Identity Crisis and The Archer's Quest because those were finite tales with a clear ending that did not overstay their welcome. The Tornado's Path moves at such a glacial pace that certain plot elements become difficult to follow. By the end of issue 1, the Trinity are still talking over a table in the Bat Cave. It takes until the end of issue 5 for the Justice League to form. This initial storyline is followed up by a crossover that does little to further the status quo set up by Meltzer is previous issues. The penultimate, self contained issue 11 would be excellent if Meltzer's Justice League have more room to breath, but feels greatly out of place next to two bloated story arcs.
2. Lack of finality. Meltzer sets up various plot points such as a romance blooming between Red Arrow and Hawkgirl, Black Lightning masterminding a web of informants, Geoforce obtaining his late sister's abilities, and Vixen losing the totem which is the source of her powers, but none of these are resolved by the end of his run. Meltzer's final issue plays the part of a half-assed epilogue with another scene with Red Tornado and his family, Hawkgirl and Red Arrow in bed, Deathstroke revealed to be behind Geoforce's new powers, and Black Lightning talking to one of his informants, but none of these scenes resolve any of the loose ends set up in the previous issues. The end teases Martian Manhunter and Arthur Joseph Curry joining the team but this never happens.