The thing is after BR2 it became paramount to complete virtue deeds asap because the pot for earning higher ranks was to be cut in half.
People who had high virtue ranks were still being screwed but not as badly as those who'd have to rank up in the new system. The Live Stream confirmed that SSG were happy after running "the numbers" internally, so many might have been intent over the last couple of weeks to complete existing deeds. I've earned quite a chunk of LP myself.
Then comes BR3 and the huge hole in available virtue earning was plugged, suggesting we had been mislead over the "numbers" being fine. This turned the need to complete deeds as quite detrimental to ranking in U24, once you had achieved 20 on live. Literally each further deed you completed would get half the advance and no longer be available to do in U24 for the full advance.
As it stands atm we can say don't rank beyond 20. But we don't know if they are still listening and will make further changes. All the signs, form the Live Stream again, are no more betas so that's usually on with the release instead.