Updated game. Where are these new pro league tiers?

As topic says. I don’t see any difference 

Wait for server maintaince, I think it will be done after current PL and before new one

Yeah, most likely after this PL there will be a server maintenance as Mag said

“We will perform a maintenance in the following days so everyone will be on the same version. Once everybody is on the same version, the patch note will be posted, with full details of all the new features, changes and improvements included in version 3.9.”

I guess it will be for the next week PL, but it might also be after all this month PL finished  (for not messing with the monthly rewards).