Sorry an ECU remap won't do too much for the way the DSG selects the gears. You may pick up some lower end torque/power which will help it pick up better at lower revs but that is about it.
What you really need is a DSG tune.
At the moment only APR do these and they will set you back around $1200 - see Harding Performance for full details. Some of the other tuners do DSG tunes but not for DQ500 7 speed DSG gearbox in Tigs (yet). One of the things you've then got to worry about is that you've modified your DSG gearbox from manufacturers standard so all bets are off with respect to warranty.... and DSG gearboxes are not cheap things to repair.
So the other option that a number of people (including myself) have done is to buy/install a flappy paddle steering wheel. See this thread for all the details - http://www.vwwatercooled.org.au/foru...uan-56968.html.
Advantage of this is that it's a standard VW product available in Golf (plus in other countries is available in Tiguan) so "shouldn't" void warranty. You can then run around in manual mode and change gears from the steering wheel. This allows you to get around all the deficiencies in either D or S mode. Or if you do drive around in either of these modes to manually over-ride where required (down shift to first gear at low speed in "D" / up shift before 4,000rpm in "S").
And I completely understand your frustration at having shelled out a fair sum of money only to need to spend more to "fix" what "should" have been done in the factory.
I'll get off my box now.