Some of the proposals could well affect GA. Communications obligations under IFR outside CAS, under VFR at night and under VFR in RMZs, for example.
The Southend RMZ experience triggered a change to the associated airspace category, primarly because pilots weren't communicating in accordance with SERA.5005:
A VFR flight operating within or into areas or along routes designated by the competent authority, in accordance with SERA.4001(b)(3) or (4), shall maintain continuous air-ground voice communication watch on the appropriate communication channel of, and report its position as necessary to, the air traffic services unit providing flight information service.