Your MCM-related report was in this thread: http://www.matrixgames.com/forums/tm.asp?m=3441317
The issue with deploying MCM gear was fixed in B445, and the issue of helos being lost to mine shrapnel was IIRC resolved in another report. With the addition of comprehensive aircraft damage helos are even less likely to be brought down as a result of single shrapnel anyway.
IIRC there are no reported LOS issues in the current public version. Of course new bugs could appear, as happens with all evolving software. Post a suitable save on the Tech Support forum and we can investigate.