Zazie is spot-on.Particularly the blackcurrant doesn't come through as much as I would like.
FA Blackcurrant 4%
TFA Meringue 3%
FE Lemon 1%
TFA Sweet Cream 2%
TFA Vanilla Deluxe 2%
TFA Marshmallow 1%
I would suggest lowering the following: meringue (1.5%), vanilla deluxe (1%) sweet cream (1%) and marshmallow (0.5%). Four percent total versus the 8% you have now. They will still sweeten your mix at 4% combined.
Try that. You can always tweak those 'to taste' later.
Also, FA Black Currant has sweet and tart notes. Good call adding the FE Lemon. Black currant and lemon pair well together.
If you want a touch more tartness and a little more berry flavor, consider adding FA Raspberry (0.5% - 1%).
One last thing; if you have FA Gin, consider adding 0.5% - 1%. It will enhance the citrus and also brighten the black currant (without imparting any actual gin alcohol flavor).
Good luck