I'm a little relieved about this. Don't get me wrong, he's been by far our best and most consistent midfielder this season.
However, looking at his Rangers career in it's totality, outside of the EL run and a semi final against them in his first season, he has never stepped it up in the bigger games.
He's a water carrier. A fairly decent one, but we'll never regain supremacy in Scottish football with Lundstram being the lynch pin in midfield. This is entirely my opinion, but he slows down the game too much for me, and he lacks the technical ability to dictate the tempo of a game. For the wages he's reportedly on and is asking for, we could find a younger, technically better and potentially more profitable replacement. When a young full back (who had previously never played a senior game in midfield until this season) outstrips you, in almost all areas of your game barring experience, it's time for us to move on.
With Diomandé and Sterling in midfield, Raskin in reserve (assuming he stays). The midfield rebuild won't be too exhaustive financially. Not when you consider the fact Jack has been a non factor for a few seasons and Lunny has been patchy (at best). Literally adding one more midfielder and strengthening at fullback would elevate our squad exponentially.