Hello Baz and welcome to the board. I don't know anyone on here who has removed or blanked off their EGR valve but I'm glad you know enough not to just go ahead and blank it off, it can bring on the EML and might have to go in to get it all re-set. Along with your other question about removing the DPF I'd say you'd need an ECU remap, trouble is it's ilegal to do it in the UK so firms can no longer advertise that they'll do it. I'm quite sure there are some who will still do it but it would need to be word of mouth.
Sorry I can't offer you anything by way of personal experience but maybe some one else can.
2015 Antara Exclusiv 2.2 163ps Manual 2WD