This is great information. Quantitative data about newer powers/mechanics is generally very hard to find - so I'm grateful to find this thread.
That said, if your description of Hybrid Assault's mechanics is accurate, then I'm not sure the examples you provided afterwards are useful/relevant. For example, if Hybrid Assault Radial only gives us a second hit of the base damage (not modified by AT scalars), then its proportion of the total will plummet if the player uses standard damage slotting (+95% damage), not to mention other damage buffs. This principle holds for the Hybrid Assault Core too, of course.
Likewise and perhaps most importantly, most players will attack more than 10 times per minute. It's difficult to make a precise estimate across all builds and powersets, but I suspect the truth is closer to 30-40 attacks per minute on average.
So unless I'm misunderstanding something, which is entirely possible, your Scrapper examples should look more like this:
Radial
Scrapper:
30 hits for 112 damage = 3360 damage * 1.95 slotting = 6552 damage
3 critical hits for = 3 * 112 * 1.95 = 655.2 damage
6 doublehit procs for = 600 damage
6552+655.2+600 = 7807.2 damage over a minute.
Core
Scrapper:
30 hits for 112 * (1 + 0.95 slotting + 0.75 hybrid) = 9072 damage
3 critical hits for 112 * (1 + 0.95 slotting + 0.75 hybrid) = 907.2
= 9979.2 damage over 1 minute
9979.2-7807.2= 2172 extra damage you're dealing each minute with Core over Radial as a scrapper.
This comparison, again if I understand it correctly, will shift quite a bit as the player gains/sheds damage bonuses. In the extreme case, for instance, if the player gets Fulcrum Shifted to the damage cap, then the Core boost will do literally nothing.
Just based on the idea that Radial has a soft limit of 6 procs per minute, though, my suspicion is that the Core will generally be better, almost regardless of the player's AT damage scalar. Then again, it's not clear to me how often/consistently the player can stack the +damage from the Core boost.
Please do correct me if I'm wrong on all of the above. I appreciate the discussion.
(Actually, it occurs to me that we were both double counting the crit damage, because 10 attacks with one of them being a crit should yield 11x single-attack damage, not 12x - or in my case, 33x single-attack damage, not 36x. I've fixed that now.)