Can’t change antenna mode from a to b or if i changed once then can’t back. Problem on 4.17 and 5.0 maybe other too.
Tested with some CM9 cards
You can not change ant-a or ant-b from version 4.13 in nv2 package, classic wireless package works without problems, try. 
Hello ,
You can check that with version 5 , i change it and antenna-a or antenna -b or others , please check it with package 5.
Yes, it works very well in v.5.