The coat of arms is certainly splendid. I liked the acquisition of Malta too - you're still working towards your goal of historical 19th-century English possessions.
The Byzantine Empire, less so. You now have to be wary of the Ottomans, the French and Castille, which might be too much to handle. Having said that, the fleet and the vassalisation of Scotland leaves you nigh-invulnerable from serious threats at home.