That... doesn't appear to be evidence based. More "Do something... anything"
Quite honestly, 10 day was already on the short side (if the purpose was to reduce infections).
LFT's are still pretty poor at proving a negative (though multiple negatives still lends confidence - but I want 2 negatives for people with no reason to suspect infection).
Omicron gets things started quicker than previous variants, but I've not seen anything* to suggest that patients stop shedding virus much quicker.
* As ever, just because I haven't seen it, doesn't mean it isn't there, of course.
ETA: OK, buried in the article, that's just if you're asymptomatic AND fully vaccinated - a level of nuanced that will be missed by the 80%* who don't read past the headline / tweet.
Further nuance is that it's just England, and isn't until Parliament reconvenes after Christmas (so 2 weeks away) - which in turn means that it may not happen at all.
* figure pulled out of my backside; probably an under-estimate though