I'm in two minds about Mash, but the better half says he's bloody important. The other half says he could bring in £20-30m to be used in a player that can play all across the three (as in Arda Turan).
But he's there to allow us to play, and when we're on our game, he allows us to play with some freedom. Wether we could do the same with a Lucas/Aqui or Lucas/SG or SG/Aqui partnership is another question (I have severe doubts about Aqui and Lucas together - who will gloriously prove me wrong tonight) but I think Mash needs a proper partner and/or outlet. Lucas has done well with him at times, but it's going to be a hard push to get that great balance between Mash and you know who.
I'm glad he's here tho, as I do feel better when he starts.
I don't think we'd benefit from asking Lucas do his role for a number of reasons either. Firstly, nobody mops up as good as Mash. Secondly, we would lose out on the occasional, and bright ghosting run of Lucas, and thirdly, nobody mops up as good as Mash. Maths eh?
But this is assuming that the 4231 we've had going for a while will continue... maybe it wont? Time will tell.
On the shooting from 30 yards question... I think he's got one of the best cracks on him (that's not a quote from Carra either). He always keeps his head over the ball and often gets close... closer than bloody Paul Ince did anyway and that's a fact!