Last week I discovered that Virgin have, for the second time now, moved the time of our outbound Summer flights with no notification or email. Both times they were within the limit to not allow a free change, and tbh the latest one has moved the flights back to a better time, so not complaining about the change per se, but why no notice? If I hadn't logged on to check something else I may not have seen this time change for a good while yet!
In my experience it is very hit and miss. Sometimes you get a notification, often not.
I saw at the weekend that one of our Delta connecting flights in the summer has changed. The aircraft has changed and we appear to have been moved to a later flight.
Not had a flight change notification from VS (or Delta) yet though.
I have alerts set up on Expert Flyer and check the VS website frequently to try and keep up.