You're hung up on naming conventions for some reason.
1) Hard and Extreme are only used for dungeons and primals at the moment
2) Those basically mean nothing anyway. More parties wipe to Pharos Sirius normal than Pharos Sirius Hard. Where's Ravana normal?
3) It seems very important to the devs that more people be allowed to access raid stories via DF
Alexander is called Normal Mode/Savage Mode because they don't want people in Duty Finder to feel bad for wiping to "easy mode." Alex Savage is very clearly the main raid attraction, intended for groups of friends or like-minded players to use teamwork and strategy in order to kill bosses and get loot. Alex normal is very clearly balanced for the Duty Finder crowd to go in, kill it easily, and get out without too much trouble.
SCOB Normal was clearly the main raid attraction, intended for groups of friends or like-minded players to use teamwork and strategy in order to kill bosses and get loot. SCOB Savage was an extra challenge mode added by the devs in order to give groups who were already fully farmed and familiar with SCOB something to do. That's why it only gives titles.
Personally, I also think that SCOB Savage was added because without it 2.3 would have been a pretty gimpy patch as far as battle content goes. As I recall it added housing, a primal (Ramuh?), CT2, and SCOB Savage. If you compare it to 2.1, which added ~*three*~ extreme primal battles in addition to CT and PVP(?), it would have looked a little sparse without SCOB Savage.
Anyway I'm rambling here but I'll just say this: Savage SCOB was a lot of fun to learn and progress through. So were First/Second/Final Coil. Gordias and Midas were not. They're okay once you actually know the fight 100%, but there are far, far, far too many super punishing and instant wipe moves during the learning process. I very much welcome a return to anything resembling Coil difficulty and I don't care what stupid name they give it.