Well, one thing I REALLY don't get: how come the Document (Catalog) Keyword Library isn't populated with the keywords from the Catalog itself ?
The new keywords features are an improvement, but... now we have Keywords, Keywords Library and Keywords Filter (have I missed any ?) - Library & Filter should be combined, as in Lightroom, Aperture and indeed Media Pro. Isn't that just screamingly obvious ?
How complicated does it need to be made ?