Over a decade ago I had 1 Brahma feeding a power distributor, and 4x Vishnu for each component.
I now have 5x Heimdall v2 and find them much much better than the Vishnu loom, but there was a 5 year gap between these setups and my system changed a lot, so its possible that's the real improvement. My experience of the Hiemdall2 vs earlier cables is the exact opposite of yours. Again, system changed and system synergy.
I also have the QB8 and its mandatory for using Nordost power cables. They do not like to be feeding off power conditioners. Everything just opened up and became more lifelike when inserting the QB8. It truly surprised me as its just an empty (solid and well built) box.
I am looking at the Tyr 2 as the next power cable upgrade, skipping the Frey2. No good you think?