We need another English player if we want the squad to be the same size. Personally I wouldn't want a smaller one when we've got quite a few guys injury prone or coming off big injuries - Kompany, Mendy, KDB, Gundogan.
I don't think finding an english player who could do a job for us is as hard as it was back in 2015 though. There's a lot of talent coming through around the country and we don't need a world class starter, just someone to replace Delph.
This would also solve the "losing an HG player" problem.