Well... yeah, but, it's more than an opinion: the dead have been radiocarbon dated, which is how we know they didn't all die at the same time as originally believed.
And if they died at different times, especially when most of them died before the Romans arrived, then the whole big battle theory just sort of falls apart from there.
And if they died at different times, especially when most of them died before the Romans arrived, then the whole big battle theory just sort of falls apart from there.