LoL is fully franchised across most (if not all) of their regions so there's only one tier 1 tournament system. They have two regular splits of a certain number of matches per week and per split. IMO I like the system, it's a consistent number matches across most weeks throughout the year and helps build up storylines for teams and players. I would be very surprised if Valorant didn't move to a franchised league, at least in NA and EMEA, considering the success of both LoL and Overwatch, but we probably won't see it for a few years as the scene grows (IIRC they already announced they're not franchising any time next year).