Lenovo Mobiles has already announced the release date for Lollipop 5.0 updates for both A6000 and A6000 plus variants. The actual date of release is not mentioned yet in the upgrade matrix.
Lenovo has released a new OTA firmware version update of just 27 MB ( Kraft-A6000_S040_150805 ) to all A6000 series users. But, this brought a little disappointment to the users, as they are much waiting for a long time for the Lollipop release. The earlier version is Kraft-A6000_S037_150605 which is released in the month of June'15.
However Lenovo has promised to give the Lollipop upgrade in this August month as per the information we got. The current update may be to make the device ready for the much awaiting Lollipop 5.0 update. The Lollipop version may be released in a week or two.
Lenovo has released the last full OTA update of 1060 MB for A6000 in March'15 ( Kraft-A6000_S032_150327 ). After that this is the second bug fix and stability update received.