For higher levels the addition of scarab of death to everyone will have little effect, the reason for this is that nearly everyone in our duel range already has the relic, it will only stop the torture chamber invitation with subplasma attacks... and quite frankly the lose of that soul energy is negligible.
Now on the lower levels ( until level 60) it would be a massacre, every time you get attacked and dragged to a torture chamber you would get soul energy equal to 500x the level of the attacker, without any sort of reduction. This would in fact kill the PvP part of the game on those levels, and sort of kill the "absorve as much soul energy as you can" theme of the game( if one is interested in the Legend storytelling), making players afraid to carry soul energy when duelling, because they would simply lose it to the relic . After level 60, the addition of AA abilities would mitigate this effect, but still.
Is it wort it, maybe yes, maybe no! There are pros and cons in both situations. One thing i can tell you getting that relic on my early days was a real sense of achievement, had to trade resources to get the ducats, had to restrain myself from spending them, had to wait for the right opportunity, it taunted me several times, but nearly one year after starting the game i finally got it... And it was sweet... Kind of get this feeling with every hard to get relic