5 seconds is ok if we look from effectiveness perspective;
though, there is a big difference in user’s perception of instant trade vs 5 second delayed trade.
I always advocate for better, faster, smoother UX.
if majority of votes will approve this feature, I suggest that visually position must be opened instantly, while it should be clear that position is not finalized yet, and the price is “fetching oracle price” or something like that.
also, the concern is there might be problems in keeper to signer communication, especially in time of big volatility.
I suggest we might implement a doomswitch to automatically rollback to stable version with 1.5% if there are signs of malfunction.