I presented this paper on CCCTB to the Kenmare economics conference back in 2008. Many in attendance felt that it was unlikely to come to pass. It is clearly on the agenda now though it is not yet certain that it will meet the requirements associated with “enhanced co-operation” (which, under Lisbon, requires nine countries rather than the eight mentioned in the paper, which was correct at the time. Nothing else, as far as I can see, needs updating).
I characterise the proposals as a “Trojan horse”. The logic is similar to that of Bettendorf et al., writing on “Corporate Tax Harmonization in the EU” in the journal Economic Policy in 2010. They say “consolidation with formula apportionment does not weaken incentives for tax competition. Tax competition instead offers a rationale for rate harmonization, in addition to base harmonization.”