On the old forums we could choose which users we removed seeing the signatures from. It was not an all or nothing option. The way the old forum did it was great. Sure an all or nothing option (which I already knew about) was good but it's far from ideal. I think most of us just want to hide...
Another issue I've found is not being able to remove the bullet points from your post without doing so manually by moving the [/list] in the bb code.
Say you have the following
Say you want to remove the bullet from point 3 as you made that by mistake. In the old forum...
On the old forum you could mouse hover over the alerts to see them. Now you have to click the alert icon to open a new window to see your alerts. A decent quality of life feature not in the new forums. A feature many people (myself inclided used a lot).