I think Frank knows he can't be that box to box player anymore so limiting his game a bit like Scholes did can pro long his career. I think he could have 2 maybe even 3 more years left if he takes up that role, obviously playing less games as the seasons go on.
Your right but Lampard is nowhere near as good as Scholes in that sort of 'deep-lying' role. Yes he could do decently well there but we should be looking to fill what is arguably the most important position in our team with a world-class player rather than a decent player
Just look at the England-Belgium friendly. The quality of player in that role has a huge impact on the rest of the team and how they play