100% sure that Tänak would be a lot faster than Ostberg if they were in the same team, very poor performance. It isnt his favourite surface but it isnt Tänak's either.
I think he would certainly be equal to Ostberg if not faster.
Even the president of French Federation himself is going to compete in Rome :)
https://www.fiaerc.com/en/news/pierres-ragues-to-driving-improvement-riches-in-erc
it is, end of the year. (but i don't know about anyone developing a new rally2, just people upgraing )
WRC mainclass from 2027