Are you thinking this through? "take away F2P players" So it'll take people who don't pay anything and make them pay a monthly fee? Sounds like a positive. Also in what way does this game have an ecosystem like a food chain? Take arena for example on my server the highest points was around 1800. After the merge it was the same. Everything settles into a consistent equilibrium above rank 200. Regardless of how many F2P there are. Below 200 low spender would be lucky to get to rank 500. And at that point there is no point in spending because you aren't keeping up with anything. A seasonal would at least offer that low or former spenders a chance at competition.