Henry Slade is playing like a man reborn, and on Saturday, he will make a seventh Premiership final appearance for a resurgent Exeter Chiefs. Given his form, you have to wonder why England decided they could do without him during this year’s Six Nations, and Steve Borthwick has now drafted a South African centre, Benhard Janse van Rensburg, into their squad. The heartening news for Slade is he has bounced back from a Borthwick snub before, respo…