Pre-departure LFTs would be better than nothing.The daftest rule of the lot is the removal of pre departure tests and the change to LFT day 2 tests. Fill a plane with Covid positive people and then let them loose in society. If anything they should have kept the pre departure test and dropped the day 2 entirely.
The annoyance with the tests on return has basically all been about the private companies, the charges, the admin incompetence, the tests that have to be placed in overflowing collection point boxes, the results that don't arrive or arrive too late to be useful.
If they were done as part of the NHS PCR testing service, (even with a £25 charge or something) then it would be different. It's that whole farce of shopping around for the best package of tests, and working out which kit they need etc, that put a lot of people off. They're only doing a partial job on fixing that.