It looks more like very bad design decision than intentional keylogger, but unfortunately due to the nature of keylogging mechanism it can be utilized by bad guys. I hope this will get picked by security monitoring software so affected users will know they should deactivate this "feature".
What makes you say "more like very bad design decision than intentional keylogger"?
The Vault 7 stuff
https://wikileaks.org/ and other material shows that a lot of computer companies, Microsoft et al, have assisted in providing backdoors into computers, manufacturing weaknesses into computers used by individuals.
Do you really believe that this case, a rather delayed discovery, was an inadvertant 'bad design decision'