Rawmarsh born Hamshaw played against the Millers on Boxing Day and also works with the clubs youngsters.
And he told the Advertiser: “Rotherham have some good players. They're a strong, physical team and work hard for each other and you'd expect them to be there or thereabouts. They've got a good manager in my opinion and a good squad of players and I'm sure they will strengthen.
“I work with the U16s down there and the chairman has put a lot of money in and will keep backing the manager and that can only be good for the club. It's still the first result I look for and hopefully they can kick on. I would like to play against them next season but to be honest I would much prefer if I was watching them (at the new stadium) up in League One.
“It looks magnificent,” he said. “It's what the town has needed for a long time and I just wish they had built it when we were in the Championship and the rugby club was flying and playing in the Premiership. It could have really boosted the economy and the community; you only have to look at Doncaster and what a new stadium did over there.
"It's a shame it hasn't happened at Rotherham. We're ten years behind, aren't we, but it's going up and it's going to bring people in and it can only be good.”