My opinion - you don't really need to go through the trouble and expense of getting the OCI re-issued. Your OCI is fine until the first time you get a new passport after the age of 50; no need to have it renewed before that. I can't think of any reason your change of address really matters... I've changed my address over the years (and also my passport) and haven't updated the OCI and this has not come up even once in several (> 15) trips to India over the years. I don't know under what circumstances the address on the OCI might ever be looked at - perhaps if you're trying to use it as proof of address for opening a bank account or something??