What would you quantify as getting subbed "a lot" when he gets a start? Quickly looking at his minutes per game (
http://www.whoscored.com/Players/75830/Fixtures/Erik-Lamela) that's not how I would describe it.
The difference between Lamela and Soldado, primarily in age, is obvious. I don't think they can accurately be lumped in to a common description like that. Lamela turned 23 in March! He's the same age as Mason and Townsend. He's a year younger than Rose. Getting a move this summer could be his last chance to get back to a "decent level in his career"? Having just turned 23? That seems like a shocking statement to me.
I don't think it's accurate to describe his spell for us so far as dire, I don't think considering the role he was bought for changes that.
He's now reached 25 league starts for us. He has experienced significant changes during his stay here, 3 head coaches, half a season out with injury etc. 2 years is technically accurate, but 25 league starts is also technically accurate and at least as informative.
If that is all we have. If 25 league starts is all the time we give to a clearly talented, very hard working young player signed for a lot of money when he himself states that he wants to stay and keep trying whilst showing every game that he is trying hard then I suppose that's all the time we give... I really hope that's not the case.