Will the full microdata sample from the March 2014 CPS (ASEC) become available on IPUMS or elsewhere? I believe the CPS has only released the 5/8 sample and that is what is available on IPUMS, but Census is publishing summary topical tables using the entire sample.
The 2014 ASEC has a split-design structure with two separate sets of income-related questions. You are correct that IPUMS-CPS currently provides only the 5/8 of the sample (approximately 68,000 households) who received income questions like those that have previously been on the CPS. Data from the other 3/8 of the sample (approximately 30,000 households) with the redesigned income questions will be available by this summer.
Hope this helps.