Yes, implementing the stamina feature is a partial solution in resolving the hunting spawn issues. Yes, from one point of view it is possible that some people will go on other characters and go to the same spawn, however, from a more logical point of view they will not. It will result in a more balanced server overall due to several reasons, for an example, players usually do not play on several characters with the same vocation, which means that *if* a character runs out of stamina and *if* he/she still has the effort to play (considering the stamina ran out of due to botting 24/7) he/she will be required to choose other hunting grounds, where players might have dealt with a similiar situation and is required to choose another hunting spot as well.
Now, this will be the case for some others, while it won't be a problem for the rest of us. Those who will suffer from this are the ones that should be dealt with, and frankly it will also be a lot easier to catch them. Also, undoubtedly, more gamemasters will play a significant role in all this, which means I really hope all the suggestions will be fully analysed and taken deeply into consideration. I do also agree with Talaturen that this stamina change will encourage more people to play manually, which is also an important factor in this.