How easy is it to access the 7-9 grades?
In the first year, grades will be awarded statistically, with the same proportions achieving each grade as previous years. The guarantee is that anyone achieving a C in the old system would get a 4 in the new system, and an A in the old system would be a 7 in the new system.
With my parent hat on (DD in Y9), I can't get worried about these changes. They are going to happen. I can't see how they will affect option choices. What was coursework/CA in the old system is now rolled into final exams in the new system. There isn't any choice to fret about.
As for MFL, I am pleased that they are doing away with the memorised CA tasks. I don't see that these contributed to any kind of fluency or adaptability in practical situations. My DD got an A* in French and Spanish at GCSE and is now doing AS Spanish and GCSE Italian, and she says she can't remember a word of French (5 months after her GCSE). This disappoints me, so I hope the new system will enable students to retain and apply what they have learnt.
As a teacher, I can't get too excited about the changes either. I want my students to do their best, regardless of the grading system. I will miss the CA as that was an area I could control and really encourage the weakest students to do well, but I will not lose any sleep over it.