That's quite the move, usually I noticed that Accord owners tend to stay Accord. If Honda had kept the 10th civic similar to the 9th, would you have not gone for it?
I did the same, going from an Accord V6 to a Civic Touring. I was looking for a bit smaller and more nimble with better gas mileage. Got all of those and was amazed to find the Civic quieter, with a much smoother ride.
I would not have switched to a Civic if the new one was similar to the 9th gen. I would have considered a Civic last time, but the 9th gen wasn't nearly good enough to substitute for the current gen Accord. The 10th gen Civic is definitely good enough, IMO.
If Honda improves the next Accord on the new platform to an extent comparable to how much they improved the Civic, it may make the TLX pretty much redundant.