I just recently applied CU1 for SQL Server 2014 SP1 (http://support.microsoft.com/en-us/kb/3067839) to my development workstation and one PROD server. Analysis Services continues to report itself as build 12.0.4100.1 (which is SP1) and not build 12.0.4416.0. Given that there are quite a few SSAS fixes in this update, this doesn't seem to be right.
When I look at the file information for CU 8 (http://support.microsoft.com/en-us/kb/3067836), I see a whole host of SSAS file updates that I do not see in CU 1 for Service Pack 1. From my outside-of-Microsoft perspective, it seems that the SSAS updates were not included in this update as advertised.
Can anyone corroborate?