Panasonic G80/85 for events

It really depends on exactly what you do and how flexible you are in terms of differences.

I'm not a pro, and I don't shoot with DSLRs, so I don't have a direct comparison.  As a hobby shooter, I do drag my gear through 8 hour renaissance faires.  I have the G85 as well as the older Olympus E-m1 mark I.  While I prefer the E-m1 mark I because I'm a long time Olympus shooter and prefer the Olympus way of doing things, the G85 is a good mama bear camera (as in Goldilocks where the baby bear bed was too small and the papa bear bead was too large).

However, one thing to deal with is power.  DSLRs just last longer on a single battery than do mirrorless cameras.  It is the nature of the beast, with DSLRs having an optical viewfinder, they don't have to power the viewfinder/rear LCD all of the time, and DSLRs have heavier batteries.  So you likely need to think about buying more batteries and if you are doing long shoots, getting the battery grip.  There are third party battery grips that are much cheaper than the Panasonic grip.  When I use the grip, I set the default so the battery in the grip is used first.  When the display says it is no longer using the battery grip battery, I change the grip battery at the next convenient break.  I've shot video and watched as it switched to the battery in the body when the grip battery was depleted.  If you are shooting video or from a fixed platform, you can power the G85 externally either with a larger battery or with A/C power.

I shoot JPG, and I presume you would shoot RAW.  With JPG, sometimes highlights are blown with default metering (RAW has a little more headroom).  You need to think about watching the zebra patterns to see when highlights are nearly blown and dial in exposure compensation.  That is one of the advantages of an electronic display is that you can set it up to tell you when you need to compensate.  I suspect however, the dynamic range might not be as high as you are used to.

Being a middle range camera, the G85 only has one memory card slot.  If you need two slots, you might want to think about the GH5 instead of the G85.  Also, if your work is primarily video, the GH5 probably has more bells and whistles that you can use.  I primarily shoot 1080p and for me, the G85 works well.  The USA model (G85) does not have a 29 minute 59 second limit on video like the European versions (G80/G81) do.

One thing that Panasonic video shooters complain about is the video auto focus is not that fast, particularly for 4K video.  This tends to affect bloggers more than regular shooters, because the bloggers typically aren't behind the screen doing manual focus.

It might make sense to shoot with your friends GH5 and see if the Panasonic way of doing things would work with you.  Obviously, for the G85, there will be some features the GH5 has that the G85 doesn't.