timestamps in output

Has it been considered to have timestamps for metrics/audits in the output of ansible-playbook similar to below example?

TASK: [make sure package openssl is installed and latest] **************
changed: [server1] 2014-04-07 22:32:45
changed: [server2] 2014-04-07 22:32:46
changed: [server3] 2014-04-07 22:32:50

TASK: [upgrade SSL certificates] ***************************************
changed: [server1] 2014-04-07 22:33:05
changed: [server2] 2014-04-07 22:33:06
changed: [server3] 2014-04-07 22:33:10

You can extend output with callback plugins.

e.g. https://github.com/ginsys/ansible-plugins/blob/devel/callback_plugins/timestamp.py