FT230X 3V3OUT pin connected to 3.6V, Safe?
Good assumptions. But no. You missed one part of the datasheet. Section 5.3 shows:


  
  3V3
  3.3v regulator output
  Min 2.97 > Typical 3.3 > Max 3.63 in Volts
  VCC must be greater than 3V3 otherwise 3V3OUT is an input which must be driven with 3.3V
  


The 3.3v LDO is a Low Drop Out regulator. The datasheet does not specifically state how much of a drop voltage is required (How much greater VCC needs to be than 3v3). At 3.6v VCC, that would give 0.3v of a drop out voltage, which is well within most LDO minimum range.

Emailing FTDI would be your best option though, as they are always welcoming and helpful on design issues.

Also, page 7 is for the QFN version of the chip, with different pinout from the SSOP version. Double check which you have and are referencing to, as the pinouts are not same.

Edit: As Oli has pointed out, there is a Errata for the FT230x that shows an issue with the 3v3 LDO in the Rev. B chips. This does not affect Rev A, or Rev C (latest). For both packages, you can tell the Revision by:


  The date code format is YYXX where XX = 2 digit week number, YY = 2 digit year number. This is followed by the revision number (A/B/C).