Relic frags are REQUIRED for pretty much all the properties a dexxer needs (HCI, DCI, LMC, Hit Lightning etc), at whatever intensity - and this is what makes the idea that they should be obtained only by unravelling artifacts plain silly.
I mean, to create a _decent_ ring for a dexxer (13 HCI, 13 DCI, 7 LMC, 7 Dex, 13 resist) I currently need at least 24 relic fragments. Which means that I should unravel 24 soul seeker or something like that - and I find it silly, onestly. If the idea is that imbuing such a ring should cost 10 millions... well, I'll settle for an unbreakable, non-imbued one even if it's not exactly like I wanted (because I thought that's what Imbuing was for - getting what you wanted).
I have no recipes to create frags, and I get bored too easily to try and figure out one, so all my (less than 50 so far) frags come from enhanced loot, and I'm mostly Imbuing the right loot to avoid the need to use relic frags, so I'm not directly affected by this change - still, I think it's perfectly ok if frags are sold for 50k each or something like that, instead of 500k+ like any further increase in difficulty would likely cause.
I also believe that the devs got it wrong with Imbuing, and that the usage of residue, essence and fragments should depend on the intensity (just like it is when unraveling) and that "rare" resources should always be used, regardless of intensity. If you pair that up with the chance of obtaining the correct resource for a property when unraveling an item with the property (ie. if I unravel a ring with night sight on it, I might obtain the resource needed to imbue night sight on another item), there would be no undue increase in the difficulty of imbuing items, and it would make a LOT more sense to me.