Not sure if the good people from the Bailiwick of Guernsey want to see their taxpayer's money at work on the Isle of Man so that IOMX can have his twice-daily flight back... (even if, I fear that the flight would still end up at LGW and not LCY - Aurigny sees no point in hauling the Guernsey folks to LCY and traditionally serves LGW).
Generally speaking, Aurigny and Blue Islands are tiny airlines with a handful of aircraft each. While Blue Islands may be tempted to try stuff like SOU-MAN, I don't see them wasting their limited resources on routes like IOM-LCY, to be honest.