I'd argue that SCoB design (even in normal mode, before the DF nerfs) were in the same in concept, just not the degree or how it punished you; just punishes you by immediately wiping the entire raid rather than mechanics that would become recoverable.
T7- Had renauds that'd one shot even the tanks...with a melee swing. It's not even a skill, just a plain melee swing. Then they'd run loose and proceed to one shot everyone else following aggro list per normal. Then you have pertrifaction where it's a death sentence since masculine will always aim her circle fire toward you, if it's not that it's the allagan poison that'll do you in.
T8- Towers that would lead to photon rays, missing a landmine, getting grazed by any incidental damage source with allagan field (homing missile, cleaves or defense reaction)
t9- Every. Single. Thing. But special mention to divebombs just because it becomes so convoluted to figure out that your best shot is looking up a guide than going through hte phases over and over to try to figure out the pattern at the last phase.
It's one of the biggest reasons why SCoB is my least favorite coil raid by a long shot, with FCoB being my most favored one balancing the numbers (emphasis on number checks so you can't afford to have someone slacking, and allows for the fight to naturally get easier as you get for it), and mechanics (failure to execute doesn't necessarily mean a wipe, but instead makes the fight all that more difficult).
SCoB and Alexander Savage has one or neither of these; you can't overgear SCoB mechanics, and apparently Alexander Savage requires the entire party to be geared up to at least esos (and even that's cutting it really close), which throttles the gate in a bad sense because both esos and gordian drops are blocked for a fairly long time via lockouts and caps.
You can't overgear mechanics though. And even then, some mechanics are contingent on having all of your party members alive else it'll throw it out of order, T10 and alarums for example.
One person dying in Ifrit does not mean the entire party is SoL due to mechanics. The DPS check in that fight is still fairly loose and you're not gonna combust the entire party for dying or standing in the puddle. Titan on the other hand, had a fairly stingy DPS check on heart fight that you couldn't afford anyone to die, but they can survive getting hit by an incidential AoE like weight or even landslide until the last phase due to arena size. Most of the difficulty from titan came from the latency though from what I hear, especially on release.
In the context of SCoB or Alexander Savage, the entire party takes 20k (each, not collectively) damage if you place a meteor next to each other, or the raid gets a 30% stat debuff for two minutes if an add gets through, on top of a 3k DoT and adding damage stacks to the boss that'll guaranteed a wipe on the next casscade. No amount of gear will mitigate that, and certainly going into SCoB with ilvl210 isn't helping you survive meteors either.