Skipness
I don't buy into the apples and pears argument.
Whilst LHR is what it is, it is the UK's premier airport (arguably the busiest international airport) and should be up to doing the job.
If you look at some really huge and complex airports, Denver for example, they work better than Heathrow.
The problem at Heathrow, as I see it, is short sightedness, compromise and lack of investment.
CDG is far from my favourite airport, but one has to admire the French decision to create it, when they could have tinkered with ORY.
The UK should have bitten the bullet 30 years ago and developed STN into London's main airport, with proper surface transport connections, closing down LHR and developing it for other purposes.