It is much needed as there is a clear lack of firepower in this giant kingdom.
I think this is due to Elbaph actually being only One of Giants Settlements/Kingdoms/Islands,
They already had Harald, Loki & Dorry/Brogy which is a big deal compared to most Kingdoms + Gaban's Help & few Good Rookies,
Oda doesn't want to give them too much, cuz He gotta reserve other Powerful Giants for other Islands,
Obviously Oda must come up with something to make All Giants decide to make a move & force their appearance,
I thought Elbaph King have such jurisdiction but it's revealed He doesn't, i then thought that maybe Kidnapping of Children would anger Giants all over the World, but clearly that's not enough reason,
But now with Imu's Sudden Appearance, it's clear to me that Oda wanna escalate the Situation as much as possible to force some kind of Giants God or Religion Reveal that would make All Giants answer the Call, basically Declaration of Ragnarok!
Actually if you think of this Arc as continuation of previous one, you notice that WG started with CP-0, followed by Pacifista/Seraphim/York (Science Unit), followed by Admiral & Buster Call, followed by Gorosei, then We got Holy Knights, & then Imu himself, it's like WG are exhausting their Cards to force something out,
CP-0 gave us Stussy Reveal, Pacifista gave us Bonney Reveal, Buster Call gave us Giant Pirates Arrival, Kizaru made Emet awaken, Saturn gave us Kuma moment, Gorosei made Emet unleash Joy Boy's Haki, then Holy Knights forced Gaban out of his retirement, and now Imu is gonna give us Loki Action, Oda is preparing some Crazy End to this whole WG Board Game.
I mentioned this since Egghead Arc, i'm waiting to see WG's Trump Card (Actually that Go Game suggest that CP-0 know about Imu, meaning what Doffy discovered is an even bigger Reveal), and also the Counter to this Trump Card, these are the only reveals i'm Hyped for, otherwise i don't consider Endgame started yet.