I wouldn't worry about the one pic with the one brown leaf...often times leaves get strangled by the twisting vines which basically form a tourniquet around the leaf, killing it.
As for you hops, they look ready to harvest, doesn't look like anything wrong going on there, IMHO.
When it comes to watering, although hops like moist soil, almost all plants benefit from their soil fluctuating between dry (but not too dry) and wet (but not too wet!). We all know plants like water, but their roots also need air, and soil shrinks when dry which allows air to get at the roots. Soil that is constantly wet prevents this from happening and can cause root rot, so don't overwater your hops! Letting the soil get dry is not bad, so long as you keep an eye on the situation and water your hops if the soil has been dry for too long.
I wouldnt worry about the split in the vine, hops are very tough.