So I take it you get your understanding of the rules, from what is regurgitated over twitter, Facebook and the like, because that's not at all what the official rules say. Pay close attention the the higlighted part of 23.3 G and all of H.
In short Ferrari is not upgrading already used components without getting a penalty period.
23.3 d)Unless he drives for more than one team (see 23.3(f) below), and subject to the
additions described in b) and c) below, each driver may use no more than four power
units during a Championship season.
23.3 g)For the purposes of this Article 23.3, the power unit will be deemed to comprise six
separate elements, the engine (ICE), the motor generator unit-kinetic (MGU-K), the
motor generator unit-heat (MGU-H), the energy store (ES), turbocharger (TC) and
control electronics (CE).
Each driver will therefore be permitted to use four of each of the above six components
during a Championship season and any combination of them may be fitted to a car at
any one time.
23.3 h)After consultation with the relevant power unit supplier the FIA will attach seals to each
of the relevant components within the power unit prior to them being used for the first
time at an Event in order to ensure that no significant moving parts can be rebuilt or
Within one hour of the publication of the official race results exhaust blanking plates
(with one 10mm diameter inspection hole per cylinder) and further seals will be applied
to all used power unit components in order to ensure that they cannot be run or
dismantled between Events.
Upon request to the FIA these additional seals will be removed after the start of initial
scrutineering at the next Event at which the power units are required. All such power
units must remain within the team’s designated garage area when not fitted to a car and
may not be started at any time during an Event other than when fitted to a car eligible
to participate in the Event.
If any of the FIA seals are damaged or removed from the relevant components within
the power unit after they have been used for the first time those parts may not be used
again unless they were removed under FIA supervision.