doubt very much its your dv valve its positioned in a different area on the ed30 KO4 away from the turbo so alot less likely to fail
my thinking is its the remap - this was one of the reasons i swapped to revo from superchips, the boost doesn't come on a until c4krpm then all hell lets loose which meant it felt quick but not very progressive -
i swapped to revo 2+ and it is alot smoother as the boost comes on gradually from lower rev's rather than one big hit at 4krpm
you should have a 28 day money back guarantee, using the handset switch back to stock get a trial of apr or revo and if its noticeably better then send the bluefin back
its a £20k car whats another hundred or so quid to make sure you are happy with it