There are numerous benefits to using small and light Micro 4/3 lenses, not the least of which is a plethora of less-expensive accessories. Filters can be insanely expensive, especially for larger filtered lenses.
Luckily, all of Panasonic’s popular Micro 4/3 primes have the same 46mm front filter, meaning you can buy one set of filters can share them across your lens collection.
This Hoya kit looks like a great fit for the Summilux 15mm f/1.7, Lumix 20mm f/1.7, and Summilux 25mm f/1.4.