I think the majority of Europeans would be hugely reassured by a large and competent, defensively-focused Bundeswehr+ as the guarantors of territorial integrity in Eastern Europe. As @Krautman notes, expeditionary warfare is very hard to sell to the GE electorate and politically toxic, so why ask them to do it?
I've worked with the post-Cold War Bundeswehr and they are very, very competent in certain areas e.g. CIMIC, PSYOPS, STRATCOM, RESILIENCE, CBRN etc. These enabling functions, which avoid the direct use of kinetic ops beyond self-defence, should be where Germany concentrates it's efforts outside of the forces required for the direct defence of German territory.