Is the Standard Blockset outdated?

Altera doesn't recommend Standard Blockset for new designs but has not announced that it will be removed. It won't be removed without prior notice so you can definitely expect it to be around in the next release.

As you say, there are features in Standard that aren't in Advanced. If you see no way to design without these then you will have to use Standard blockset, but it's recommended that the parts of your design that can use Advanced blockset should do. At some point I would expect some of those features to migrate to Advanced blockset.