okay, from what I have gathered from opening all of the newer Japanese/eng expansions is:
Japanese
-20 packs, 5 cards per pack, holo in 50% of packs
-10 holos/SR/UR per box. no more.
-At least 2 regular EXs per box
-3 EXs in 50% of the boxes I opened
-1 Full Art EX per 2 boxes
-If you pull a full art EX, you will only get one more regualar EX
-If you pull a duplicate holo, you will only get 2 EXs
-Shinies are 1 per 5 boxes
Eng
-Usually 2 EX, 1Fa, with shinies being 1 in 3 boxes.
Other than that, the english ratios can be pretty all over the place. Some boxes have just 2 regular EXs, while I've seen one that had 2 FA, 2 regular and a shiny.