I hope TechED will stay, for my self this one wasn't the best I've assisted, for almost the same reason at all, Hotel location too far from convention center, food. The content was good, but a bit too much cloud and not enough Exchange, Lync on-premise sessions.
I don't know if MS plan to keep the same date for the next TechEd, but I really prefer the week in middle of May instead of first of June.
Something I hated from the convention center was the restroom, clearly not design to accommodate an majority of mens.....
Overall I love MS TechEd, but my best one was in Orlando in 2012.
Please post as soon as someone know where and when will be the next one :)