The Cavs' rosters as it currently stands, ranked in order of importance:
01. Lebron James (assuming he re-signs)
02. Kyrie Irving
03. Kevin Love
04. Iman Shumpert
05. Timofey Mozgov________
06. Tristan Thompson
07.
08.
09.
10. Anderson Varejao
11.
12.
13. Joe Harris
14. Mike Miller
15.
If Delly and James Jones re-sign, they will presumably (hopefully) fill slots #11 and #12 - guys who can give you 8 to 10 minutes a game but won't be relied upon to fill key roles like they had to in this year's NBA finals.
Maybe Rakeem Christmas fills the #15 slot, just for jersey sales - what Cavs fan wouldn't want a Christmas jersey?
It will be interesting to see who fills slots #7, #8, and #9 - those will be key rotational players, maybe the difference between a championship and another second-place finish.