You would have to think so. I think Groves is a guy that would really benefit from fighting 4-5 times per year and If he can get that on BN then it would make sense.
Matchroom wanted full rights to Groves which Booth didnt want. I still cant see him fighting more than 3times a year.
Groves' international promotion options are held by Golden Boy, so Matchroom didn't fancy it. Boxnation then probably made VVarren Groves' favourite plan B.