Losing habits are selfish plays and inconsistent effort.
Lazy shot attemps and passes, not driving to the rim because its easier to settle for jumpers, not working hard on defense. Failing to get back in transition, leaking out when you're supposed to help rebound, etc. etc. Failing to work to get around screens, not taking game plan and preperation seriously.
The list goes on and on, losing habits are really easy to define. The issue is attributing them in specific cases.
MCW is discussed in the article and its clear the coaches saw the same junk plays towards the end of last year that many of us did, and are trying to coach him up into a better overall PG.