I wouldn't worry so long as you consistently put good fuel in the car (BP Ultimate... maybe Shell V-power... avoid ANY other fuel).
The 118TSI issues were fuel related, mostly because the Euro cars experience much lower suphur levels in their fuel, and the early batches of 118TSI's came with ECU maps that expect fuels with such low suphur levels.
VW has since corrected the tunings on all twincharged motors.
Yes, the 1.4 twincharged is likely going to be replaced by another 1.4 with only a turbo. Much simpler from a maintenance and cost perspective, with a little loss in low down torque. Shouldn't hurt the resale.
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