The seasonals got harder when they came up with the Lamborghini Exclusive, no doubt about it...But still, some (most) of them are still very easy...
If You look at the latest NASCAR event, the London race was pretty hard....I managed to win it with 625pp, after softening my dampers a lot...The other ones, Autumn Ring, Fuji and Monza was piece of cake, won them in first go....But London took many tries for me....
I think PD vary the toughness of the seasonals, for newer players....
Also; if You compare the old, now closed, "World Circuit Tour 750pp" with the new one "Real Circuit Tour 750pp" You will find, that the old one was way way easier.....Not that the new one is very hard, but harder than the old one....
So the forced on SRF does not make the newer events easier....