Well this is what I think BIoWare's plan is for f2p.
Get f2p to attract new people, get the servers heavy and full again then BAM keep up the content updates. Then, when you think that patch was it BAM they hit you with another patch then...BAM another one. I think f2p was the start of something new in this game's future. More regular updates to keep people happy.
That is how I think they will do it
I think thats how it will work for the first few months because they have saved up content during that 6 months of not getting any content. After that runs out it will start to turn more towards... BAM new cash shop items... BAM more new cash shop items... BAM a very small piece of content to throw you a bone... BAM more new cash shop items