I must say that I liked this episode. It has some annoying downsides, but those are short and not breaking the experience.
Char's backstory is nice as a base for the OVA, since it shows the base for his hatred for the Zabi family.

The downsides, I have to say the CG. The quality is like watching a cutscene in a gundam game. Compared to Unicorn it's shameful.
The other part that kinda bugged me was that both Casval and Artesia are wáy too mature for their age, although for a gundam series, that isn't a rarity. It just seemed a bit too over the top

The story and non-cg parts were beautiful and really made it look 'old meets new', unlike G no Reconquista...
The backstabbing and manipulation were great, as were the appearance of very important people in the 0079 series.