Exactly. They've never advised taking an LFT and following it up with a PCR if you have symptoms... That's always been an automatic PCR (along with certain close contacts who needed a PCR too, though I think that may have been dropped now too?). The retesting was only "asymptomatic" positives. Who now don't need to do that, but DO need to register their LFT and follow up with test and protect.
But of course you can feel really grim with an asymptomatic infection... headache, sore throat, snuffly nose etc. Just not fever/ cough/ change to taste or smell. And given those big 3 seem less common with omicron, the distinction seems a bit weird to me... So fewer people will actually qualify for a PCR based on having symptoms (big 3) but prevalence of the disease the PCR tests for is actually increasing! You kind of wonder what the point is any more 
At some point they said the change in rules was just while cases were so high in the community, implying that they'd go back to needing a PCR to identify/ confirm infection. Though the general thinking now seems to be stopping "community" testing altogether, and just focusing on high risk settings (health care, care homes, prisons, food packing etc) supplemented by surveillance testing (like the ONS and what they do with flu all the time) to get an idea of overall infection. So they may just quietly drop the intention to revert to PCRs!
Overall, I think that's a good plan. The social pressure to test for a disease that isn't causing you anything more than a few sniffles, if that, that if you do have means you have to isolate, missing things that you would otherwise be perfectly willing and happy to do or go to work/ school , in order to prevent someone else possibly becoming very ill (though largely treatably ill), just seems a bit back to front now. Just test where that risk is greatest, and let everyone else get on with it. But then I am, and always have been, a selfish granny killer.