If toggling on/off has lag that’s because the buttons support multi-press and have to wait to confirm it’s not a double-tap. Check if these options help:
Having said that, the Aeotec V3 is slow, that’s a fact. The V4 is a 70% faster which doesn’t look like a huge improvement.
The best way to control lights with buttons in a smooth way is Matter bindings as commented in other posts, but so far there’s not much in the market and I’m not aware of any wireless remote that allows that.