When that bike was new Avocet cranks would have been considerably more expensive than Sugino and considered an upgrade. They are a bit on the light side but high quality.
Campy shifters are dead reliable and shift perfectly pretty much forever. (except for the last couple years with the nylon inserts but let's forget that) No point in switching them unless you go to bar ends or something. I like duopars but I've never thought of them as super reliable. They are super cool but be cautious. Kind of like a Citroen DS.
I hated grab on grips then and hate them still, so I'd encourage you to get some new tape. Some people liked them, obviously. There were at one time a thinner version called Grab-on racing grips, which time seems to have forgotten.