Blah blah life and things and stuff and yadda yadda...
Summer sun baking me in my studio... blah blah... PONY.
Why there pony hiatus? Why they divide up season 5? I no want waiting. I want ponying.
UNLESS THERE'S A PLAN... ...To tie together some plot point from the EG movie into the finale of season 5? IT COULD BE POSSIBLE. Maybe Sunset Shimmer returns to Equestria after helping Twilight make friends, thereby mirroring what Princess Twilight and her friends did for her--and by doing so unlocks her Element of Harmony (empathy? humility? compassion?) which gives her new powers which require her to leave the human world because the EoH magic from pony dimension causes weird stuff in the human dimension. So she's all, "Well Twilight, I introduced you to the friends that you introduced me to, but now I gotta go back to horseland through this here magic portal, k'thnx bye! Use the magic book to write me!" Then she shows up in the Season 5 finale or the Season 6 premier AND JOINS PRINCESS TWILIGHT SPARKLE AND HER CREW TO SHARE FRIENDSHIP ALL ACROSS THE LAND!
Siiigh... I guess I'll just do something else while I wait for the cartoon ponies to return and restore meaning to my finite existence...
The less Illuminati line of reasoning is that they wanted to focus on promoting EQG 3 while also airing MLP in a period when not everyone is on summer vacation. In addition, this will allow them to potentially sync the festive episodes with the proper dates (as it seems to be the case considering the leaked episode list)