Going with the current scenario, I'm sure that Hoyoverse might launch new free weapons in the game in the future. It's quite possible that we can see an introduction of new weapons in the game in future events or in-game quests. Just recently, new Sumeru craftable weapons have been released in the game that is really niche to their uses. If you ask me, then I'm not a big fan of them yet, but you never know when a character will launch in future that can use them to their maximum potential.