I might. I've been thinking about the issue, and here are the fundamental problems that I've encountered in every attempt I've made to finish this fiction:
1) Without going back and revamping the entire project from the ground up, I'm going to find myself constantly working against what is now canon. I started writing this story at a time when we hadn't even seen the end of the first season, and now we're already more than halfway through the second. A lot has happened in the show, and a lot of it contradicts where I'd been planning to go from the start.
2) While season 2 has its fair share of good bits, I find that overall the season leaves much to be desired. I won't lie; much of my "OMGYAYPONIES!" has been killed by what I perceive to be a dearth of extremely formulaic writing and poor character development.
Don't bet the farm on me finishing/redoing this series, but it's still within the realm of possibility.