As mentioned elsewhere, a source that I believe is totally reliable and in a position to know has told me that the proposed spec for the 7.5 is to have an optional CVT gearbox and minor interior changes, but that is about it. As the CVT gearbox is not going to be brought into the UK, except I presume a s a grey import and even then who would want it, I guess this means little change for the UK. I hear that a new engine and 6 speed box will not happen until the 8, which will be another year.
The above is due to be announced very soon and when I was told about it, I was warned that the spec. was not fixed and could change. I know that is vague, but don't shoot the messenger.