I have flown a lot with my 4 year old over the past few months from the states to LHR. WT is the way to go and I agree generally it’s rather empty compared to WTP and Club. However, coming from someone who used to fly Club and First exclusively, cuddling with my kiddo is good enough to persuade me from
hiring a nanny for those flights. The services in club and first don’t seem up to pre pandemic levels yet to make it worth it for me.