In life, if the shoe fits, you wear it.
In the NBA, if the shoe doesn't fit, sometimes you have to wear it anyway.
Replacing another player is rarely easy. When a team loses one player to free agency, trade or injury—or a case of nostalgia—the next man up is immediately gifted additional responsibility. If replacing an on-court liability or financial albatross, this isn't a challenging undertaking. If supplanting a valued asset, it's the exact opposite.
Heavy, then, is the burden certain players will be carrying in 2014-15. Offseason happenings have forced a number of teams to look to new or familiar faces that weren't in this position last year.
Most of these replacements won't actually replace everything, or even anything. But adjusting expectations doesn't change the context of their new roles: These case-specific players will be donning someone else's shoes, whether they fit or not.