Merges by jenkins-bot bear no information: the true information is that someone approved the change. Sure, that everything went well is nice to know, but reviewers/owners/whatever are those who have to check and email notifications take care of that.
Example of redundant info:

10.23 < gerrit-wm> New review: Nikerabbit; "Tested both the old and new editor in couple of cases." [mediawiki/extensions/Translate] (master);

V: 1 C: 2;  - https://gerrit.wikimedia.org/r/54827

10.28 < gerrit-wm> Change merged: jenkins-bot; [mediawiki/extensions/Translate] (master) - https://gerrit.wikimedia.org/r/54827

(Maybe "V: 1 C: 2" is a bit cryptic, but that would be another bug.)

Version: unspecified
Severity: normal
See Also:
https://bugzilla.wikimedia.org/show_bug.cgi?id=35538
https://bugzilla.wikimedia.org/show_bug.cgi?id=46452
https://bugzilla.wikimedia.org/show_bug.cgi?id=46282