Oh, no it was, and it was catastrophic, the economy, the administration utterly collapsed under Norman incompetence. England's famed coinage which had been 95% pure silver (what became sterling silver) since probably the time of Offa of Mercia was debased.
However, when you describe it as "pre-feudal" you're perpetuating a post-medieval myth that before the Normans came we were living in some sort of Tolkienesque idyll. In reality, even before the Conquest every Englishman needed a liege lord and whilst it wasn't strict Norman feudalism it wasn't exactly "not feudal", though. It was terrible principally because the English became, to quote Robert Bartlett, a "subject people".
So, we should describe the period before the Normans as "pre-Norman" or "pre-Conquest" as opposed to "pre-feudal".
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