I think that the key here is a change of attitude towards MFL in the schools. That has to be root and branch from SMT to parents and students and the exam boards.
With the examboards it is chicken and egg. They are producing the kind of qualification that will assess the kind of rote learnt material that students are spoon of force-fed. Teachers in turn complain that they are forced to teach to the exam because less and less time is allowed on the timetable. Language acquisition is best done slowly, especially the first one. When you have slowly absorbed the complexities of the first you can springboard into others. The reason being you have learn how to learn a language. If this is not done, there is no foundation and not only will what you have learnt just crumble away, but you will have nothing on which to base any further MFL acquisition.
SMT have had no reason to value MFL in most schools since 2004 when it became optional. As has been said many times soft options have been prefered yielding multiple equivalences. If this is to really change sufficient time has to be allocated on the timetable.
The rush to cut KS3 to 2 years will only work if primary MFL is properly taught. There needs to be a well organised transition from KS2 to 3. It also needs to be taught at KS2 by someone who knows how to speak the language.
In this more positive atmosphere where an MFL is seen as part of the core, a more positive attitude amongst parents and students can be fostered.
I have reason to go into the MFL dept of a local public school frequently. This department is thriving and the students enthusiasm is evident. The contrast to many departments in your bog standard comp is painful. Not in equipment and books they are the same, but in the atmosphere. The environment is cared for and the students line up for lessons testing one another for vocab tests, listening to one another practising dialogues or in one case rehearsing a Spanish song. I digress.
In the circumstances I have outlined above I decded I did not want to work anymore. I love my subject with a passion. A passion shared by a number of my friends who I meet with regularly to practise my languages. They share my passion but could not bear to work in the conditions of MFL teaching over the last decade.
This is why I maintain there are plenty of qualified MFL teachers out there. Only either they don't want to work in the status quo/ante or they have been made redundant. If the conditions were right they might change their minds. Goodness maybe I would!