FoD should allow Paralysis to proc more often with skills like Electrocute, yes. The breakpoints will shift with having both Shame and FoD.
Electrocute is a speed co=2 if I remember, this is unique, but stricken stacks poorly.
Fragment of Destiny allowing all signature skills is a nice QoL change! I’d love to sink my teeth into a nice Magic missile, Electrocute, or Shock Pulse build (living lightning anyone?). 
Sad that both MH proc damage, synergy with other items, and Signature damage is still unchanged. The damage still isn’t where it would need to be for those builds to compete.
If the intent is to promote Hybrid builds by combining Hydra damage and Signature damage on the same item, I’m of the strong opinion that this is the wrong way to go about doing it. It forces the player into one Hybrid playstyle to fully take advantage of said item, instead of letting them choose their own.
As I’ve said above, I think the Spectral buff would work well on Typhon’s Veil. Sets are positioned uniquely such that they CAN limit player choice into a certain playtstyle, and that’s okay, because we always have LoD to fall back on if we prefer not to be limited, for example, by using a signature to gain our Spectral Stacks for Hydra multiplier. As the spectral buff is on Fragment of Destiny though, it would put this restriction on ALL Hydra builds.
We won’t be seeing any Hybrid builds exist from Fragment of Destiny likely soon, (and maybe ever). Signature skills still don’t have the support needed. On top of this, to successfully Hybrid, the damage between the two abilities have to be balanced relatively the same, otherwise you’re wasting itemization (less DPS).
Things that would go a long way to allowing us Hybrid:
- More slots available to itemize. Need Space for BOTH skill bound multiplier items. On top of this, space for toughness or Utility (OID,AW,EF,IG,Karini,SG+IC etc.).
- DPS increasing items that boost damage of both skills are very appealing. This is why we saw some hybrids with Hydra / Meteor channeling in S20 that were… okay damage wise. DW+ES were those type of items that multiplied both skills damage. Combined with the low weapon slot investment for Meteor + Hydra it worked out. LoD could fit the armor items too. The new FoD allowing all signature skills is great because it could potentially allow for DUAL generator builds to exist in the future!
- Better DPS balance between differing skills.
That’s why I’m going crazy; the reverse is occurring. We have more and more weapon slots taken away by multipliers that all affect the SAME skill.
EDIT (10/1/2020): Granted DPS increasing items that increase damage of multiple skills taking up multiple weapon slots can cause the same issue (evidence Deathwish), but these items can instead be designed in such a way that there are more class themed, mechanically interesting, interactions in place for activation.
Even though we’ll have a 4th cube slot next season, because of the above, I doubt we’ll have the space needed to reasonably Hybrid.
He should remember this play style!