Regarding warranty, there are no two ways about it... It'll be void! It's as black and white as that as far as I am concerned.
Having remapped thousands of land rovers over the years, I've not ever known of a failure that has been as a direct result of the power increase. Sure, there may well be in increase in wear and tear, but so long as the service work is done on time, using good quality parts, and the car is not abused, then the differences in lifespan of the car's engine and drive train should be negligable. These area's are the ones that are likely to suffer as a result of a power/torque increase.
Brakes are almost certainly going to wear out faster, but this should easily be monitored at service time. As you can see from the photo above, this is just one other area we are looking into improving. AP Racing 6 pots anyone?
Another factor to considder here is the way in which the torque is delivered. Smooth and progressive power delivery is always going to be more gentle on the transmission than a tune that has a lot of 'punch'. Surges of torque can lead to massively increased wear in gearboxes, differentials, and other components in the drive train. Not good!
Since the Evoque is based on the Freelander 2, it's got some well proven components fitted. I've not heard of many serious mechanical failures on those, and I've remapped more than I can remember. The experiance gained from remapping these has helped me to gauge the changes required to get the best from the Evoque. Some maps are actually identical to the 2007>2011MY FL2 models, but obviously there needs to be changes made elsewhere due to the DPF, so as not to cause regen any more often than needs be.
Here's the next issue; Programming procedure. The introduction of the latest generation of engine management systems is a good thing as far as I am concerned. The anti-tuning protection is so good, the tools and equipment needed just to make comms with them can cost tens of thousands of pounds. Due to this, The only people able to remap these are those who are from reputable companies, filtering out your average 'we tune any car' types that seem to be cropping up all over the place!
This is a good thing for our industry.
Programming of the latest generation of Land Rover's can at present only be done on the bench. It may be that in time the manufacturers of the tuning tools we use, crack the code to enable ecu programming over the OBD port, but don't hold your breath.
Chances are there may well be a few PCM software updates (eg. to the engine ecu) over the comming months, and so any remap work carried out now, would need to be re-applied to the new software after the dealer update. This causes the issue in having to bring the car back to us after every dealer software update.