There still needs to be room in the product stack for the 9060 series products (and potentially lower end products / rebrands) so pricing can only go so low
Their current product stack has four cards below £500. Though it does feel a little cramped. If the 9070 XT is £450-£500 as rumours suggest, it may make sense for the 9060 to be £199. That then leaves a £250-£300 gap to slot in the 9060 XT (£279-£299) and 9070 (£349-£399).