Everone on here will have different views and that is healthy. In the end people have to work out what is best for them. I am only stating what I do. I encourage people to breed their own food (particularly locusts as they are expensive to buy and therefore I see people only feeding cheap stuff. If you keep babies too hot I think they will behave like "P" addicts. If mine were not hot enough they would always be huddled under the heater, and they are not. People also forget that different materials radiate heat differently---astro turf has pile so that when they are on it there is a lot of air space under them and the material does not radiate heat like stone or metal would. They are therefore heated from above. Having said all that, people should do what they think is best for their reptiles.
I raise all of one clutch together with beardies but not leps as I have had them fighting at 3 days old, yet others are OK.