The main difference between WT and WT+, and MRTC for that matter, is space. I find it next to impossible to sleep in any Economy Class seat, and an extra 2 to 4 inches or 2" extra recline is not going to change that. Therefore, entertainment in the form of multi-channel TV is the only thing that helps people like me endure an intercontinental flight, and on that point, BA is doing ok.

Having said that, I avoid intercons in Y like the plague and save up miles for upgrades. BA (in the EU EC) wasn't an option for this in the past, but will be in the future.

Change WT? Yes, bring back a smoking section and I'll do ten times as many intercons again.