I have no clue who starts. There could be a lot of experimentation with combinations with this group and I think the combos are plentiful.
There are some things that strike me (in addition to youth and relative inexperience) such as size (KBD, Loving, Mitchell, Bell, Giddens, Thompson are listed as 6-7 or taller; Lyle, Grandstaff, and even Tate are all listed 6-4 or taller) and some interchangeable parts (with the exception of Harris who is a true PG due to being vertically challenged, Lyle can play two positions, Mitchell can play 3 or 4, KBD seems as much or more of a small forward as he does a power forward, etc.).
Another issue is who leads? Loving certainly doesn't appear to have leadership qualities. They are all young and it is usually the older players who take on that role. This will be an interesting season. I think Thad gets a relatively free pass next year, but the following season will carry some high expectations IMHO.