Roster updates in existing franchises? I disagree. Once you start a chise then the roster should be locked in and any progression should be limited to what happens in your chise. New onlines chises should start with the most current roster releases, I agree.
I think there should be an option to play with updated rosters. They come out every week so why not. The way I play my online league is week to week using unranked so that we get updated rosters, been doing it for years now although the updates weren't as frequent. The teams that arn't taken get a W/L depending on what happens in real life.
I'm not into trades nor playing multiple seasons. I play one season a year, one game a week. I like playing with teams that resemble the NFL, updated rosters are the best way to do that. There should be a way to use updated rosters in online franchise if people want that. Another thing I'd like to see is the ability to transport real game stats into a season for unused teams. I'm sure neither will ever happen, but its a fun way to play IMO.