I have passed VCP-DCV4/5/6, VCA-NV VCP6-NV and VCIX6-NV and I failed VCAP-DCA5 a couple of years back.
That's not to show off but to point to having a some of experience with VMWare exams.
The VCAs are atrocious. I can't gloss over it any more than that.
I have also taken and failed the VCA6-NV (after passing VCP and VCIX for NV and the VCA-NV the previous year...with the minimum 300 mark)
The other VCAs are no better. A jumbled mix of sales/technical and topics which are part of other tracks (e.g. CMA or Hybrid).
I had a voucher and am a completionist, that's the only reason I did VCA6-NV after already having VCA-NV.
I wouldn't spend £80-£100 of my own or my company's money on a VCA.
VCP's and VCAP/VCIX's?
Wonderful and I highly recommend them (albeit with the initial £2k outlay for a qualifying ICM course)