The 333 exemption and the pilots certificate are two separate issues. The 333 exemptions give power to the secretary of transportation and by proxy the FAA to waive the statutes present in 14 C.F.R as laid out in the FMRA of 2012. These cover things like the low altitude flying, or even the inability to place 2 inch lettering on the uas, or to carry the manuals and placards onboard. All of these are required under current FAR, so you need to get an exemption to operate commercially.
It should be noted, however, a pilot certificate is not a requisite to getting a 333 exemption.
What FMRA does not allow the FAA to do is waive the pilots certificate requirement for commercial flight. So until they get the sUAV airmen certificate, prior to beginning commercial flight your PIC must have an airmen certificate, your company must have the 333 exemption.
Hope this helps your understanding of the current procedures.