I believe the "merits" of pitching roe,are hyped notions that are unsubstantiated myths. It is nay impossible to trump a properly delivered dry fly,for banking copious Salmonids in all conditions.
Having never tried any of the overtouted Roe Cures,I could not offer anything of substance,regarding that much sensationalized approach to yield a strike.
When I bank a fish via Swatter Tackle,I simply leave the roe go,as it is of no value to me. I do not consume it,nor do other fish dote upon it is a bait substance,so it is a superflous substance in my opinion.
I have never seen anyone pitching roe,hammer anything resembling the like number of fish I do,via The Swatter. Roe in my opinion,is a dirty,nasty,messy,worthless means of being repeatedly skunked. There is nothing as rewarding as a beautiful presentation via spey rod and it's subsequent results. It is utter poetry in motion and a thing of unfathomable beauty combined.
I personally view those that stoop to bait,as Heathenistic Bastards,of the lowest order and fully unappreciative of the natural order of things. It makes me cringe to fathom some both devote time and freezer space to such notions.
Anyone that would do that,would likely have zero qualm using a barbed hook,neon dangle doodads and probably paste fish in the head with an aluminum bat for Christ's sake! I'm miffed just trying to picture the scenario.
'Course,your [bleep] mileage might vary........................(grin)