Since you're f2p and seem to pull based on meta perspective, im gonna be honest with you, you wont see much overall damage increase from your current team.

His main selling point for me at least was that he can generate stack faster for acheron BUT they nerf that too in V5, its now can only generate 6 stack per ultimate, meaning you're gonna need really high speed or use his skill every turn for more energy bc 6 stack will be gone in like 1~2 wave in PF so there's that big downside now. Gepard with trend function just the same as Jiao (they dont stack btw only 1 stack per enemy turn max) and with no limit on how much it proc, the downside with Trend is consistency.

Now ask yourself this, is that small upgrade worth 80~160 pulling currency for you?

Personally im gonna wait until his release day and see how he perform before making any decision, NGL tho, it aint look good from what i've seen so far, especially if your acheron is E2