Two-step regulation change across 27 and 28 to reduce role of electrical power in F1 engines is FIA compromise proposal, see table below.
Four of the six engine manufacturers need to agree on any changes to the 2026 power unit rules hence this copromise, which it appears has happened & will go forward for formal approval at next WMSC meeting on 23rd June.
OEMs like Audi had reservations about the need for hardware changes to these expensive and complex engines having already invested a fortune to get to this season. They obviosly can live with compromise.
Ferrari were on a different tack hoping for some relief from ADUO against Mercedes, however since Merc is not the best of the best - that's RBPT - then any advance can be neutered by Merc's own efforts to gain power. This compromise may give Maranello another chance to re-visit fundamentals on the ICE above beyond ADUO balance of power leg ups.
Could this also aid Red Bull, might the best ICE get a chance to show a clean pair of heels to others with reduction of battery power - if indeed RBPT has the top ICE.

