Although there are many commonalities with ITP, a lot of decisions you make will be based on how your child's ITP behaves. We spent the first year after diagnosis treating our son (steroids first then WinRho when he got low.) But had we known what we learned since, we are now in year 3, we probably would have gone to no treatment sooner. We are lucky that our son's ITP tends to stay above 50k and he doesn't have many bleeding symptoms so we don't have to treat, but we didn't know that at first. It took two years of watching counts, being careful when he is sick because his counts drop (they boost up a lot after a sickness however and then level back to 50-60k) and finally just getting used to the idea that ITP is with us indefinitely.
We have tried homeopathy, gluten free diet and anything else I could find that may improve/support his condition. Perhaps it's all the kale and berries keeping his counts high - who knows? This is all to say, try anything but know that not treating, otherwise known has watch and wait, is a fine option.