You can hardly compare Manchester to Dundee from Stansted like for like when the main reason that STN/LGW and LCY's links to Manchester have gone is due to a journey time of just over 2 hours by train.
Dundee takes three times that from Kings Cross FYI.
Stansted is well connected to the city, just 45 minutes down the M11 by road or 48 minutes by train to Liverpool Street from a station located on-site unlike it's competitor at 'Bedfordshire International'. How do I know this? I've done it on many an occasion.
It's also close to Cambridge, the whole of Essex, Hertfordshire, Bedfordshire and accessible to the Midlands via the A14. It also has an excellent coach network to pretty much anywhere you need to get to.
Do I need to touch on the fact it has connections to god knows how many destinations via FR & EZY
Go educate yourselves. I bet half of you don't even have the experience of ever having used Stansted.