The card system would be ideal for a new licence type that combines restricted PPL with the upcoming medical requirements.
Call it the PPL(A)R for recreational or or restricted or whatever. Drivers licence requirement self regulated medical only. Same card as a drivers licence, simple endorsements added to the card such as Retractable, CSU, Multi engine, navigation and CTA approvals, photo for ID purposes.
Limited to Day VFR only, maximum 4 passengers (not seats), MTOW 3 tons limit, private operations only. Additional met requirements VMC(R), must plan to ensure at least 2000ft cloud ceiling for all operations and remain at least 1000ft separated from cloud at all times and 8km visibility (I added this for thoughts on preventing accidental IMC encounters). No aerobatics, IFR, formation.
The idea then being you scrap all the other stuff, that was GFPT/Restricted PPL/recreational, etc etc and just have the PPLR vs PPL full, which really the main difference is the medical.