The most nerf-worthy factor of the new class isn't starting with spectral throw, but the fact that there are like a dozen health nodes right near the starting position of the skill tree.
Holy hell, I'm like lvl 10 on hardcore with zero twink gear and almost 500HP. Shit's crazy
That's an unrelated thing though, and to be honest after making a couple of scions, I'm not sure it's worth it. Sure you can frontload a fuckton of health right away, but your stats are shit so you can't equip all that much or lvl your gems, so you need to stop adding health quickly and go pickup stats, which are fairly far in efficient nodes so it's mostly filler 10 nodes on the way to something else. You don't really need all that health right away and other starting locations can generally find a good amount of health in the first 10-15levels too without sacrificing everything else for it. The main advantage of the build is how it lets you pick 2 opposite sides of the tree without too much loss, however if you focus in one area, it's not that good, especially if that area isn't marauder/templar where the health is located.
I've been making builds a lot and a lot of them around the bottom and right side of the build, melee shit so you want duellist/ranger stuff, or trapper so you want ranger or shadow area, wanna check acro too so that. In every cases, you can start duellist, witch or ranger and get a stronger build right away and eventually they'll just be the same, so Scion is a worse choice. The ranger start is especially strong imo, since it combines both health and evasion, and exits right away into massively efficient nodes(all the larger nodes that gives like +20stats and 2 other things) and good life nodes. There's no wasted stats and you get everything right away, including a decent boost of dmg if you want. The witch start with the change to the flask nodes has very good value if you're gonna need mana quickly, you get out of the starting area quickly by picking flask efficiency nodes(which are good for every build almost and can later be respeced out if CI or something) then hit that large fitness node for health and the 30dex 50str gives you all the stats you need.
I feel the Scion start is so so. It feels really nice to have super high health right away and if you exit via the health regen path instead, you're literally unkillable until brutus and even he doesn't do fuckshit, but at the same time you can only really use attacks efficiently(since they don't need to be lvled) and you won't do too much dmg until you start investing into other shit. The ranger start is so much better imo, it is by far the best, and Duellist might be second. Witch and Scion I'd put together, they're good if you know exactly what you wanna do but they're more situational imo. Marauder and Templar are fairly outdated but still work out fine, and I never liked Shadow start or area in general, it's a great 30-60 area to grab damage in but starting these is like so annoying with how little health there is.