Bug 15760, 13690 are about Koha::Schema. They are very small but they fix global problems and can have big side effects.
Patches that add external JS libs, move files, update less/css, or thing like bug 9978 are huge but are easy to review
> A one line patch can be much more complex than a 1k lines patch
¯\_(ツ)_/¯
Now you got me curious. Can you provide an example of this? For
research purposes :-)