@EVNow I suppose history will tell all, whenever that history becomes history.Depends on how quickly they can release to yokers. If they can get it out with 10.3 - I think few will remember this in 6 months. If it drags on - then, yes.
I've been in such situations where a small % of users somehow would get overlooked and cause a lot of headache. With the pace of work mistakes are unavoidable. In such situation - best to acknowledge the error and if they don't know when they can get that taken care of, just state it (give a date for a date).