We have a firepower 1120 at one HQ and an ASA5516 at the other, soon to be replaced by another firepower 1120 that we have had in the box for months.
Honestly i’d like to rip them all out and swap to something else as altogether.
I used to be a hardcore cmdline guy, I still use CLI to config switches
In 10 years of using Sonicwalls and Forti’s I’ve never needed to log into the cmdline once…
then u didnt need to tshoot real issues 
gl tshooting something on meraki fw.
Look at it another way
In 10 years and maintaining 50+ Firewalls I’ve never had what you call real issues.
I’d say that’s makes it a pretty good product
most of my issue, were self inflicted or bad implementation on the other side, so yea (:
Hey at least you admit it