1. That size is fine if your frog if its at 2.5 inches. If it closer to three inches you are going to need a bigger enclosure soon. Make sure that you have three sides covered.
3./4. What are you using to monitor the temps/humidity in the enclosure. 82-84 is good for day, and you want about 77-78 at night.
8. Meal worms are no good for these frogs, they have a hard to digest shell that can cause impaction. Not sure about lobster roaches and pbeonix worms but I belive they are in the same boat. Nightcrawlers are the best staple food hands down. Make sure you get undyed and unsented one though.
9. Get calcium with D3 and a multi vitamin. They are very very important for your frogs health. Dust with the calcium dust twice a week and dust with vitamins once a week. Do not use the same dust on the same days. Dust with at least a day in between.