Either as my Fenix5 ages or in colder weather (but not even freezing) my vibration from the watch is virtually undetectable.
The chime is also too quiet/short.
Older Garmin models had options to change the duration, they need to give that to us on the Fenix.
Unfortunately I doubt we are going to get a single new feature on this model anymore but one can hope for something this simple.
Yes I know it would reduce battery life somewhat but if you can feel or hear the watch the battery is pointless.
Maybe there is an undocumented setting that can be hacked via crafted FIT files, I will have to research, this is a technique Garmin used on older models to activate features that were not available from the menus, a special FIT file is places in \NEWFILES to activate or change settings (example of changing settings via FIT file)