End-game is constantly changing.

SCoB replaced BCoB as "end-game". SCoB is the only end-game content right now. ST, the follow on to CT, is not going to be end-game unless or until it is a higher tier than SCoB. Considering that BCoB was higher tier than CT, I rather doubt that ST will be higher tier than SCoB.

When the Third Coil of Bahamut hits, or something harder with getter loot than SCoB hits, then it will replace SCoB as end-game. End-game is an ever changing point, as content gets added on top of the existing end-game, replacing it.

The single-group nature of BCoB and SCoB still mean they are not raid events, despite SE's classification. A full group is 8 people in FF14:ARR. While an argument can (and, a page or two back, has) been made that the half-group "light party" is the real group, and that the "full party" aspect makes BCoB and SCoB raids, that would logically also make Castrum, Praetorium, and all primal HM/EM events raids as well, something no one, not even SE, is claiming. since they are not raids, Coil is not actually a raid either.

BTW - I've still never played WoW. The term "raid" originates from well before WoW killed the Warcraft RTS series.