As ASAM games are rare, despite some heroes that are not suited for this mode, I’m mostly fine with it as is.
I would say more, but as is their gift, Xenterex summed up my small issues with ASAM, and articulated and summarized the many reasons and issues brought up by other posters since ASAM was implemented.
From my experience, many people dislike certain heroes like Genji, where even if your team wins a fight, due to his lack of self sustain, your team often finds they don’t have enough life remaining to take advantage of that window of opportunity, coupled with Genji’s less than stellar siege capability.
However, many of those who don’t like ASAM, simply don’t like this feature, and it won’t matter what heroes you remove, or lower the CD on health fountains, these players, as a point of personal preference, won’t be satisfied until ASAM is deleted.