I scrolled it high level but it does not look to me like this is solving any real problem and probably its creating new ones. Sure if you are cash strapped startup and can't afford getting a tax advice or an investor that does not want to pay for a due diligence this could save some money on paper. Most of the supposed benefit of this pan European legal entity seems problem that has been already solved in the real world. The same type of entity works more or less the same through out of Europe with mostly marginal difference, and sounds more like an excuse than anything. Of course each jurisdiction has is own jurisprudence which make the landscape more complex, but once you get a new type of "inc" you are going to get new jurisprudence, only that in this case you are going to be a lot of jurisdictions conflicts and potentially you might have to take into account multi-jurisdictions jurisprudence making everything even more complex. Also I would remove as second point an "EU-central registry", it's not exactly a killer feature considering that all the European registries are currently accessible from a single web page already.