Roseland has always been one of my least favorite venues... I know it's extremely culturally relevant, but if this closure pushes a couple of the smaller venues into premiere status then I say it's 100% worth it.
I've seen some great shows at Roseland, but I'd rather see those shows at nearly any other venue in the city. I agree with the post earlier about the only better possible closure in the city would have been Hammerstein.
I think the only thing saving Hammerstein are the balconies to be honest. Roseland only has one upper level which is GA. Hammerstein has actual seats on 2 levels. It's also perfect for sit down shows, not to mention wrestling and other special events. Also Hammerstein is bigger than Roseland capacity wise 3500-3200. There was really no need for Live Nation to have both venues. Hammerstein keeps getting the almost arena ready tours while Roseland keeps getting artists on the way down.