Doesn't matter if he's Brtish or not imo. Sheamus is Irish and was WWE and WH Champion so I don't think that matters tbh. Actually his mic skills aren't good if we're honest, but he can have a world title run imo.
His nationality indeed shouldn't matter but. But somehow it does. I can think of one English wrestler who has held a major American world title, and that is Nigel McGuinness. TNA hasn't had a English world champion, the WWE most certainly hasn't despite having had Regal, Dynamite Kid, British Bulldog, Wade Barrett and many other prominent British names on the payroll throughout its history. I'd be surprised if the NWA has had an English world champ.
And Neville is not a big enough name or act to change this.