To be honest I feel Linkedin discussions are getting more challenging every passing passing day. Just few days one of the quality groups posted that you can no longer just initiate discussions. Only if the group admin feels it is relevant enough and will add value to the group, will they approve posting for it.
The discussions now in certain groups are at complete mercy of the group admin. Where do I go now for the latest happenings in the field? For the insighful articles written by credile people? I under stand that LinkedIn has opened it's publishing platform to all but it will be another couple of months before it rolls out for all of us. And it is quite impossible for me to follow each and every person and read their blogs/articles.