I think the new regs have not slowed the new cars enough.
Whn a new cartype is coming in, they need to cut at least 5 sec a lap on average on all tracks.

The very capable engineers will cut the aprox 2-3 sec a lap we see now will almost be gained in 2026.

The easiest way to easy cut more is to make tyres harder. Not sure how many shore this years C1 and C5 tyre are. But he easiest is to tell Pirelli to make all tyres 3 seconds slower.
Little cost for the teams, and will give the the needed effect.

In addition will harder tyres will give a bonuseffest by showing who are the best drivers, since cars will become harder to drive!