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

sorry I am not involved with 6500 so I do not know about that. Hopefully someone else will reply...

Currently there is no plan to add full support for 6500.

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...