I can forward your sugestion to the product team but if you want an official answer you can open a support case with TAC so they can work with the business unit that makes such decisions
Yes it shows that in the inventory information of associated access points. See "Figure 6-29 AP Name > General Properties Page" in the WCS config guide : http://www.cisco.com/en/US/docs/wireless/wcs/5.2/configuration/guide/5_2mon.html
A similar error seen once with CNA installer was due to some InstallShield bug caused by certain special characters in the folder where the installer exe is stored or the folder where CNA is beign installed or the system temp folders. Not sure if you...