With the signing of James Jones, they can now start Mike Miller, if they choose:
C: J. Anthony / Big Z / Magloire / D. Pittman (r)
PF: Bosh / Haslem / J. Howard / J. Varnado (r)
SF: Lebron / J. Jones / Da'Sean Butler (r)
SG: M. Miller / (Jones)
PG: D. Wade / Chalmers / Arroyo
A bench of Big Z, Haslem, Jones, and Chalmers is pretty competent. Lebron / Wade won't have much of a problem initiating the offense, and Wade can defend the vast majority of point guards.
Kudos to Pat Riley for getting so many players to buy into his vision. If you'd shown me the above roster before free agency began, I would have told you it was an absolute pipe dream that couldn't be accomplished in reality.
The season isn't over yet, but I fully expect the Heat to win 65+ games next year. Basically, Riley took a 47 win team, and traded J. O'Neal, Daequan Cook, Q. Rich, Michael Beasley and Dorrell Wright for Lebron, Bosh, Big Z and Mike Miller.