In my experience, besides reverse getting noisy, the 2nd gear syncro is the first thing to go on those transmissions. I think it happens from people shifting quickly and beating the syncro as it's forced into gear.
You could replace the gear oil with some synthetic [ my transmission expert suggests Lubro-moly but that's more for racing], maybe mixed with a little ATF. Someone i know has used only ATF in his VW's for years and he has no complaints. He started using it when his were getting noisy/hard to shift cold.