Alan, as I lived within a spit of the Hare and Hounds for around 50 years, I am a bit puzzled by your post.
I used the Hare and Hounds on and off until around 1990, and found it quite all right. I wouldn't consider the area to have declined. If you take the H and H as a local you would be looking up Marsh Hill to the Stockland and in the opposite direction to the Yew Tree or the Safe Harbour. In the other directions maybe to what once was the Crossways or the Chase, and the Armarda.
I believe the problem facing the H and H, as far as punters were concerned, and for most of the years up to 1990, was the proximity of the Brookvale Social Club, and more particularly the Barn Social Club, which I believe was once considered the biggest in Birmingham.