Just saying that NISA has given CSIII more marketing than XSEED ever gave the series in the west is a hell of an understatement. They have:
- Prepped media ahead of the announcement to give the announcement the most possible reach before it dropped
- Immediately had a PAX panel ready to detail exactly what was going into the translation, and who was working on it
- Continually posted updates about the game - trailers, character bios, etc - on their social feeds leading up until launch
- Heavy presence + on-site demo at E3
- Flew Kondo out to the US, again, for both Anime Expo and a press tour
- Besides just Kondo's panel at AX, they also held multiple other panels - including one with a large portion of the English voice cast
- Collaborated with a freaking Cafe + Bakery to hold a pop-up shop for a week, complete with themed Macarons and decor
- Released a demo with transferable saves weeks before launch
- All the merch. Just... all the merch
That's missing things, but it more than makes the point. For most Falcom games, the most that XSEED did was tweet three times and update their twitter banner - a tweet when the project is announced, a tweet for the release date 2 weeks before launch, and a tweet on release day.
NISA quite literally marketed the game as strongly as they could. They stopped just short of giving it a AAA marketing budget.