I think we should keep Group Datasets and Extract Block. I use these frequently.
If Cell Data to Point Data is added to common, it will need an icon. I don’t think there is one.
I don’t think alphabetizing is a good idea for the same basic reason I don’t want the keys on my keyboard alphabetized. I don’t think that will make them much easier to find, and it will mess up users that have become familiar with the order. Also, it makes sense to have filters like Clip and Slice next to each other. Also, also, there has been a lot of talk about renaming filters. I don’t want the order changing when renaming happens.
I agree with @mwestphal, especially the part about agreeing with me, but also the addition of Resample to Image filter. A nice tool to hack around tricky issues in ParaView.
I’d be tempted to add Point Volume Interpolator to this list. It’s really handy for filling spaces. Unfortunately, it doesn’t work in parallel .