Welcome to the Fourm.
A couple of things to think about.
We still can't give you specific answers because you haven't told us if your using self shielded electrodes or gas shielded. Although your parameters look like gas shielded to me.
A WPS can have a pretty wide range for voltage... Specific manufacturers recommendations are almost always within your procedures "range" and will bring you much closer to the best operating parameters.
With FCAW.. Keeping your stickout (contact tip to work distance) as close to manufacturers recommendations is also critical. If the flux is not properly pre-heated (too short stickout) or if the flux is over heated (too long stickout) your wire will not perform as it should.
If your FCAW wire is designed for a specific Gas and you stray from the Manufacturers guidelines you could cause problems like undercutting or worse.
Some FCAW wire is made to use 75/25 or CO2 100%... Most will provide seperate suggested parameter ranges for both gasses.
Finally, If you are using E70T-X wire to weld out of positon (other than flat and horizontal fillets) you will run into problems.http://www.hobartbrothers.com/products/Hobart/Excel_Arc_71/
The above link is to a good example of a manufacturers guide for FCAW wire. Note the difference in voltage settings for different gas and that the parameters for Vert and Overhead welding are going to have to be more closely followed for maximum performance. You may find that different manufactures suggest different ranges for the same wire diameter and designation.
I generally play it safe when running FCAW and use a 10 degree drag travel angle for flat, horizontal and overhead positions and about a 5-10 degree push travel angle for Vert with upward progresson.
Others may have more to tell.