BML was not designed for a long term diet and is very high in Iron content prolonged use could lead to kidney and liver failure. You still have to balance your phosphorus to calcium ratios.
No diet is easy all of them take time to make sure you are giving the best for your gliders. Dried food like a small amount of high quailty cat or dog food is ok but only one or two pieces. Sugar Gliders suck out all the moisture out of their foods so you need to limited any of these dry foods to there diets. You will find that most gliders don't drink alot of water but gain what they need from the food they eat.