Photo by Tim Nwachukwu/Getty Images Erik Speolstra, Miami Heat The Miami Heat have spent the last season or so hovering between contention and transition. They have talent, experience, and culture — but still lack the kind of star power that could take them back to the top of the East. If they decide to make a move, Lauri Markkanen might be the swing worth taking. The Utah Jazz forward has emerged as one of the NBA’s most complete bigs — a 7-footer who can shoot, rebound, and create offense