Unless you're travelling at a particularly busy time, need to ensure you are absolutely first in the taxi queue at Paddington, and have to spend the 15 minutes intensely working your laptop, with nobody looking at it and vast elbow room...
I would say 'no'. It's 2+1 seating instead of 2+2, and you can buy tickets on board at no premium, plus you can sit at the very front of the train, which is the best end to go to the main concourse at Paddington. I'd do it on a freebie, but wouldn't waste someone's money on it.