@Kayseur
Well, I would agree with everything mentioned here but have to state one thing: Beyond the heat TIF is still one of my greatest idol experience I had. My view may be subjective, but I like the Odaiba area, the big Market Square, the several stages, food stands, ice cream parlours and that the majority of idol groups I like are present and run around there freely.
If you can manage to go there and as you stated you liked the line-up from last year, you should give it a try. BUT: The heat is a big issue and I won't recommend you for staying a whole month in Japan during this season. YOu basically won't have any motivation to do sightseeing, shopping, whatever. I basically spent my days around TIF at other (indoor) idol events, hence escaping the sun.
Meeting up people there is difficult during the event, as everyone has a different schedule, if your tastes aren't similar. So the best options would be at the Market Square or in the evening after the shows. But at that time all you care about may be, where to find the next shower
and as it is in Odaiba, you have to avoid missing the last subway.
Therefore my suggestion for you: Take a shorter trip and keep an eye on the website. TIF promised a lot of changes. Maybe they really improve on some issues (though I doubt it).
And otherwise I recommend the @JAM Expo end of August. It is indoors, several stages, featuring most of the idols that are also present at TIF, and when you prolong your vacation into Septembre, the weather gets more comfortable by day.
@mixedmedia
Intersting Line-Up. Then you can tell me about how GALLETTe (and Akari) is faring nowadays
But the lobby will be already occupied by the members of バクステ外神田一丁目. Good luck then
I also wonder about the amount of fans present there. As it is a sunday I would even expect it to be sold out.