I feel very good about the current µ43 kit - which is a good and a bad sign.
For some reason it's the last few pieces to my kit that have forced a reassessment and ultimately the utter derangement of said kit. Adding a single item can make others look in need of an update. Yes that sounds bizarre and counter-intuitive, but I've been there, more than once. A new piece makes old ones look old - or too large/slow/irrelevant - and suddenly the kit spontaneously combusts!
I'm sitting pretty with 17 and 30mm primes, cute little things that can fill in when the 12-60 isn't the right choice. Both f/2.8 primes are faster than the 12-60 at any point in its range, so low light makes them worth having. They also work nicely with the 45-150mm telephoto zoom: (almost) 15-30-45mm steps.
But what about the low end? Shouldn't something in the 8-12mm range be a good fit? Well.. maybe. For that matter a 24mm Wesley could give me (almost) 8-16-24-32 steps, and more steps means less gaps..
-no No NO!! This way lies madness. Take the 12-60 and NO gaps happen!
I was overjoyed in my film days to go as wide as 24mm - what has changed to make me so FL-greedy?
Primes are 'better' for image quality in general but zooms exist for a good reason. The 12-60 can focus closely with no attachments and keeps me from changing lenses in the field. And Lumix cameras can do panoramic shots, meaning that the 12-60 can be used in portrait mode for wider, stitched shots.
Yes I'd love a fisheye type, and at some point one may appear. I also really like the Sigma 60mm. I like gear, OK? Just don't get back into the rut of acquisitions that force other sensible choices to fall apart.