Way back in the early days i used bigwigs, but DBM became better at some point i switched and never looked back really.
So i cant really compare now anymore as i have no idea about the state of bigwigs.
However i saw people mentioning Iskar timing being off for DBM. Yes, that does happen when you don't update it.
Earlier that day the update was already live for us (though i could imagine region and the time eu vs us raid could have an influence to ones experience.)