Apparently I have a lot of time this morning! My $0.02!

Yeah.. I hear you about the juice. Not a bad mom at all! But maybe it is jsut a bit too acidic while the gut heals...
As for the eczema... food is a decent idea for the underlying cause. With DS he had something very very similar to the pattern you describe from about 4 months old until 14 months-ish. (plus he had it on the back of his neck). We suspected dairy allergy from other things, so at 1 year took him to allergist and they did the back prick test and sure enough, allergic to dairy, eggs and nuts. He had never eaten any of those, but I did regularly and was nursing him. I stopped eating all dairy, eggs and nuts and he cleared up by 15-16 months. NOW at 26 months he still gets the eczema in the crease of elbow and knees and wrists if he is near people who have eaten dairy, eggs nuts or have pets. (it is a terrible cycle!) his poor skin never looks PERFECT! I can always tell when DH ate cheese at work, because DS gets the redness on him. (not hives but itchy, raw red creases).
So I would look at what foods you may have introduced to her, recently. Or decrease eating the "top 8" dairy, eggs, peanuts, tree nuts, shellfish, seafood, soy and wheat. If she just started eating eggs, then stop the eggs. But if nothing is new to her diet, it could be other things. Eczema is tricky.. can be environmental too. New pets, new laundry detergent, cold weather, hot weather... blah blah.. Maybe when the new one is a few months old, schedule an appt for the 2 yr old with an allergist.
YOu can give her benadryl to help the itching.. we do that to prevent that raw bleeding when DS cannot stop scratching especially if he wakes up scratching and scrathing. There is always hydrocortisone.. but I would use it sparingly and only on the BAD BAD spots. Cool wash cloths help too.
Aquaphor works well to keep skin hydrated after a bath but is a gooey mess.
Ok.. I have to get out of my PJs and see what DS is up to!!!!