The boost delivery of the K03 turbo is typically in the low-mid range with the boost tailing off after 5k revs.
A remap will help a little at top end, but the best gains are to be had in the mid range.
K04 turbo pulls hard to 7k rpm
Makes me want an Edition 30 even more 
I noticed you have had a stage 1 GTI and you are now on an Edition 30. How did the performance of the the stage 1 GTI compare to a standard Edition 30?
Just noticed this
Stage 1 GTI is marginally quicker than a stock edition 30
totally different power delivery though so both feel great in their own way
