My guess is you have obtained your visa by now but have not yet found the time to report back.
Missing your appointment should have triggered the return of your paperwork and a visa application rejection (ie no decision taken). You were probably lucky to have your biometrics taken when they were. Christmas and New Year holidays may have worked in your favour, other than for the flight issue. Also, appointments are only available once a fortnight anyway so I take it you made it to the first one possible after the one you missed.
Your attending four days after the travel date you indicated is a sign you still wanted the visa and I suspect has been interpreted that way. Standard Visitor visas are generally valid for use any time within six months of issue, so it is understood there is time for a change in plans.