Question: Did ABC Give a reason to the change in who would play the role?
About the article "Private Practice (TV series)", section "Casting".

Candidate passages:
On , it was announced by ABC that Merrin Dungey, who played the role of Naomi Bennett, would be replaced by four time Tony winner Audra McDonald.
ABC gave no reason for this change.
On , it was announced that a new character, played by KaDee Strickland, had been added to the main cast.
Tony Award Winner Idina Menzel appeared in two episodes during the second season.
Menzel was married to "Private Practice" star Taye Diggs.
David Sutcliffe, Jayne Brook, and Josh Hopkins also appeared in "Private Practice".
In 1991, Brant returned to ABC where he returned to the booth as an analyst/play-by-play man for College Football on ABC, a role he held until 2007. 
Delta is a short-lived U.S television sitcom series produced by ABC starring Delta Burke.
Burke plays a woman who leaves her life behind to pursue her dream as a country music singer.
Burke, most popular for her role as Suzanne Sugarbaker in the popular CBS sitcom "Designing Women", reportedly utilized her own singing talents for the role of Bishop, and dyed her familiar brunette hair blonde to play the role.
The series premiered September 15, 1992, to healthy ratings following the ABC blockbuster "Roseanne".
The series then moved to Thursday nights opposite FOX's "The Simpsons", and ratings began to sink.
The show was pulled from the schedule and returned to ABC the following Spring for six episodes before finally being canceled.
In an attempt to infuse ratings, Burke brought her brunette hair back that spring (even re-filming the show's opening title sequence to correspond with the change in hair color), in the sake of familiarity, but it did little to save the series.
The theme song for the show was Reba McEntire's 'Climb That Mountain High' which was not a charted Reba single.
The tune appears on the 1990 MCA album Rumor Has It.
The show received one Golden Globe Award nomination, to co-star Earl Holliman for "Best Performance by an Actor in a Supporting Role in a TV-Series".  
In the early years, Keith Jackson and Dick Vitale were the top announcing crew, while Gary Bender was the number two play-by-play man behind Jackson.
Meanwhile, Al Michaels did regional games during this period.
When Brent Musburger came over from CBS in late 1990, he started working with Dick Vitale on the top team.
Jim Valvano did color commentary on games for ABC for a few years until his death in 1993.
ABC paired Vitale and Valvano as co-analysts a few times in the 1991–92 season.
In the 1992–93 season, Terry Gannon filled in on a few games for Valvano, who was the battling cancer that would ultimately claim his life in April 1993.
Many of the announcers worked for ABC and ESPN, and ABC continued to use ESPN announcers, reporters and commentators until 2009, never quite establishing firm ABC broadcasting teams even after the ESPN on ABC brand switch. 
3WV - both the station's callsign and former name - was conceived in the mid-1930s, and officially opened on 25 February 1937.
It was ABC's second regional radio station; ABC Western Victoria was later joined by four other ABC radio stations in the Western part of Victoria.
3WV was intended as a back-up to Melbourne's 3LO during World War II.
Japanese bombs never struck Victoria, however 3WV did play a role broadcasting coded messages at times.
The station's south-west coverage area split from ABC Western Victoria in 2004 to become ABC South West Victoria.
The station's studios in Baillie Street were upgraded in 2006 to digital broadcasting facilities, making ABC Horsham one of the broadcaster's most advanced radio facilities in the country.