Within Batch, there should be an option to click on multiple gifts and apply soft credit to a constituent to all of those gifts at once, rather than applying the soft credit gift by gift. 

For example, we had one of our constituent organizations raise funds through EverydayHero and after their fundraiser, there were 250+ donors/gifts. After adding these one by one to a batch, I also had to go through and add soft credit gift by gift. There should be a way to highlight multiple gifts and apply soft credit to one constituent at once for each of the highlighted gifts.