This split arrangement is going to be incomprehensible to people transferring between terminals at Heathrow who do not speak English; it's probably the one point in the whole of London where such a group is common.They could just install a good number of standalone readers with clear signage
Stand alone readers without gates also have a poor record in London. The German style where they are installed just like a gateline, but without actual gates, seems ignored. The DLR (and W&C at Waterloo) seem to install them in any old corner, which has long given issues for air passengers arriving at London City airport station. Some DLR readers are up at platform level (eg Tower Gateway), others are down in the public street at foot of stairs (West Ferry), some are head on, and others sideways.
It seems unlikely that the Freedom Pass, paid for by London Boroughs, will be valid for a journey from Maidenhead to Reading. Bot how the many who touch in with it in London are to touch out outside London remains to be seen. I wonder about travel to places like Slough; the Freedom Pass is valid to there on the 81 bus from Hounslow.The press statement said that all concessions will be valid on all sections of Crossrail.