As I told in the past, it's not about the gimmicks you want to put in the series, but it's time for the FIA and the Promoter to work on the best solution for all the stakeholders.

Manufacturers wants hybrid or EV or Hydrogen. Perfectly fine, if this helps improving the field and get more cars at the start ramp, then go for it. Either with BoP or whatever they figure out.

If a local Promoter wants to develop 3 Superspecials and 5 in-line, 6km fan-stages, then go for it. Not every rally needs to be a carnage, as long as we have a rally with enough mileage to be called a WRC event.

But it's FIA responsibility to:
1 - Develop a Budget Cap for the teams in order to make the whole season more affordable
2 - Work on the flexibility of the events themselves

Also, it's gonna be WRC Promoter's responsibility to be able to make the series more attractive in few steps:
1 - Bring partners for which you won't ask money for the sponsorship, but rather provide any service (I wrote about DHL providing dome freights for fly-away rallies to lower logistic costs), etc.
2 - Distribute the TV product in a more flexible way, providing more compact highlights and more free-to-air TV broadcasts, without asking sick prices as I learned in Italy for which NO ONE would buy. Some TV rights are out of this world and they better wake up on how the market changed. It's almost 2024, seriously.
3 - Heavily invest on "new fans", via Social Media, Twitch and E-Sports.

Regarding this last point: the average WRC fan is "aging" and thus is not going to purchase out of enthusiasm and artificial hype, but is rather doing its purchases more "wisely". Embracing those new potential fanbase would mean tons of merch sold, tons of interactions and actions on the web and a gold mine called E-Sports which can bring easily tens of tons of money for the growth of the series. On this side, everything is almost unexplored from the Promoter's POV. Quite a shame indeed.