Having the context of 'Last 20 issues in mind', shouldn't then 'Last change' hyper-links set the filter to the corresponding trigger on events view?
Don't wanna say that there is no advantage in quickly accessing a host's events, but shouldn't that rather be found in host menu?

A host may have lots of events from different triggers. When accessing events via 'Last 20 issues' one is usually interested in the events of the particular issue only.