I attended DEVCON 2015 and have some suggestions that may improve this years conference:
1) Last year's conference rooms were COLD (ski parka needed), please warm them up this year.
2) I attended two classes taught by ESL (English is a Second Language) instructors, and couldn't understand either of them. Please pre-qualify their english speaking skills before bringing them on, or just stick with those who have a good command of the English language.
3) Please list the floor that a given room is on (i.e.: Rm 123, Fl 2) in the handouts so the attendee will know where to look for it.
4) List the rooms in column order so each room has it's own column, and the events in that room are listed from top to bottom by day by time. Last year the events were in no particular order and you had to look all over the columnar map to find them.