Indeed - the easiest solution is to increase the station change time from 3 mins to 5mins & that connection would no longer be in the planners.
That would be really pointless as the 17:15 & 18:45 from Paddington only call at West Ealing in order to make the Greenford connections.
3 minute advertised connection times work at Twyford & Maidenhead no problem.
-----------------------------------------------------------------------------------------------------------------------------
That's a bit harsh about West Ealing. There are 4 trains per hour to/from Paddington, and the Greenford service provides 2 of them. A lot of people will get off the 17:15 and 18:45 at West Ealing. Remember that it's a station with about £1.3m passenger entries and exits per year