Overall MattPatt's theory isn't any stronger or weaker than any one else's, same with Zeltik's. There just isn't enough evidence to solidly pinpoint any timeline. However I believe somewhere, Eiju Aonuma said it takes places after OoT in
a timeline where Ganon appears many times. Though I can't find the quote, this would potentially rule out the adult timeline.
Now speaking of geography, BotW's map fits ALttP quite well, and reminds me of this picture
http://imgur.com/a/hgW7F
I went and compared the maps of Hyrule through out the games using only geographic features as those take longer to change while artificial structures like the Temple of Time or the Master Sword can be moved or rebuilt elsewhere.
TP and BotW maps both fit well together, just as good as BotW and ALttP. The Mountain, forest, desert and icy region all form a nice square.
Personally I want it to be in the child timeline since the downfall timeline already has so many games in it.