He's referrring to "classes in FFXIV"
1. MRD
2. GLA
3. PUG
4. LNC
5. ARC
6. ACN
7. THM
8. CNJ
However, since everyone else calls everything in every other game a class, it's semantically wrong to call them classes where when it means something different. So if you don't use the word "job" then he has no idea what you're trying to say. Also, don't quote me so he can't see what I type. That being said I found this quote funny;because this video comes to mindI have never seen anyone in a class for CT, Coil, and Hard/Extreme Primals.
https://www.youtube.com/watch?v=OxMxLb3qki0
He also has a fundamental misunderstanding of what a class is supposed to be. Naoki said classes were meant for solo play so you can have access to all the cross class skills, with jobs for party play. So maybe he'll actually make this somewhat of a reality with Rogue / Ninja maybe having different applications in solo and party play. But I doubt it because if it's strong solo, it's likely to be just as strong in party (if not stronger).
Second reminder, don't quote me. Just reply with "@Exstal"