Regarding the first complaint yes it is rather misleading and they realize that but it might help if you put in a suggestion. I'll post where later in this this message**.
In the meanwhile the only way to clear that would be to uninstall in the normal manner via Control Panel, then run the MCPR cleanup tool (see Useful Links at the top of this page), reboot and reinstall from your online account.
You can at least stop most of the quarantine items by turning off detection of Tracking Cookies as those are merely what allows a website to remember you and are rarely a threat.
Double-click the taskbar icon to open SecurityCenter
Click Virus and Spyware Detection to expand
Click Real-Time Scanning to expand
Click Settings to expand
Under Threats - uncheck Tracking Cookies
You can also empty the Quarantine folder.
Click Navigation at top right
Click Quarantined and Trusted Items in the list below to expand
Open the various sections and highlight anything you want to get rid of (you can highlight more than one)
Regarding Parental Controls, yes you have to do it for each user and that might also be a great suggestion to make.
There's also another way of influencing future products and that is by Beta Testing them. With that you get a permanent license & you have to accept all components of the product in the installation but you aren't forced to use them all and it is at your own risk as normal support channels don't exist except for a special section in this forum and a Bug Reporting feature which can also be used to make suggestions of course.
One way of being prepared for infections that will get by any antivirus is to carry extra anti-malware applications. See: https://community.mcafee.com/docs/DOC-2168
I carry Windows Defender, SpywareBlaster and MalwareBytes but there are others of course.