if fervor applied to the record then VC would become completely broken. the better change would to have bards professional CA/spells do appropriate levels of damage for the current level or increase the % recorded from 6% to something like 10%.
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is the current damage you can get out of VC atm with the way it is currently implemented and i am sure other can get it higher depending on other various things.
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this is my average fervor for the same fight. if fervor applied to the record you can on average take VC damage and increase it by 3500 fervor or x35 damage (this is without a swash in the raid mind you). this would cause VC to average hit 1.645Q per tick on average. and this would be per group member for 10 secs. digging though ACT i see groups getting anything from 40 to 60 procs meaning the total damage would be anywhere from 64Q to 96Q damage per cast of VC
overall i dont think VC needs to be changed and is in a good place. there are many other things you could change that would naturally increase VC on its own but at best you would only want the % recorded to increase.
slight edit to this but seeing as auto is probably a good majority of what is going to be recorded it wouldnt be a straight x35 increase but even if auto was only 50% of the record anything more than doubling non auto damage is going to get to crazy levels of damage. currently for that specific fight it was going roughly 2Q damage per cast of VC.