On the subject of understanding complexity in Corporate Reporting you might be interested to read CIMA's report 'Complexity, Relevance and Clarity of Corporate Reporting : Views of FTSE 350 Directors'.
In addition please note the IFRS 9 has not yet been endorsed for use in Europe and so there is little possibility of early adoption here. However, Japan, Australia and New Zealand are pressing ahead and early adoption will be available in these territories. See the AA article
