bikes work fine as they are IMO.
what needs improving first, is making the "public services" work.
take the train companies, bus companies… and post office back from thier various owners.
i wouldnt even offer to buy them, just take them. if they cant play with thier toy properly, they cant play with it at all.
not run them for profit, pour all profit back into the respective companies, to make them run more efficiently, so that prices can drop, and all the systems interact seemelessly (see dutch transport for a good example)
bike wise, i would want a bike carrige on all trains.
not a "bit of the train that can hold 2 bikes"
a whole carrige, roll on roll off, proper bike racks, and CCTV.
and places for grubby MTBers to sit!