@Mat,
Is that really true? Did you never use MPTW tagglytaggning. To have known it is to miss it. We might be able to do the same now, but with much more difficulty. TagglyTagging was the ease of use for newcomers and up. The filters, the way you could view your tiddlers. Fast and easy to use and enormously useful.
By the way - this may sound stupid. I know we are able to limit timeline - but one other plug-in I miss is Archived timeline.
Birthe