In general, an argument can be made that being the "big dog" in the lineup now is a very good thing. Land Rover is profitable as is (Jaguar apparently is not, but if you have seen the new XF - wow - I'd be amazed if that doesn't change quickly), and Tata bought them to expand their presence worldwide and instantly gain credibility in the car world. I would expect that they will invest heavily and allow Land Rover to do some pretty cool things - they are now the technology arm that has to feed the rest of Tata Motors.
Will they eventually move some LR/Jaguar stuff to India? I'm sure they will, but what isn't moving overseas today? In the end, it is a good thing to get some lower costs in to a company - hopefully the more money they make, the more they will have to invest (unless they are being cash cowed, but I don't see that being the case with LR/Jaguar). Plus, I highly doubt they will move *all* of it to India - LR/Jaguar is far too British of a brand to do that.
BTW - Tata is a *major* company by any country's standards (multi billion dollar) - they definitely have the cash to invest heavily in LR/Jaguar. Unfortunately, the same could not be said for Ford at this point in time. They needed cash to keep the rest of their brands alive - hence why they sold LR/Jaguar (and why they will likely sell Volvo soon and eliminate Mercury).
My $0.02.
Rich