These are essentially the same skill. These skills are all just a form of getting someone to do or giving us something we want.
Brawn + Convince is same as Brawn + Intimidate
Panache + Convince is the same as Panache + Tempt
Wits + Convince is the same as Panache + Convince when haggling or bluffing
This is another problem I find with such a small skill list seeing that I also feel there are skills that are more for the periid that are missing such as animal training or falconry? Also what about engineering and science skills of the time. Granted I am basing this from what we received from the 1st edition, but there a lot of skills from the 1st Edition that need or should be expanded to this 2nd Edition.