I am a bit biased, but also an
#avgeek . I think at the end of the day this will help bring more guests to AS who may not choose to fly AS because Brand XYZ was $X amount cheaper. AS can now compete with Brand XYZ.
How does it impact current guests? I think it helps current guests. Those guests purchasing Saver Fares will board last (as will their carry-ons). Most FT'ers do not fall into this group. Even those who do probably have Status. Status will allow you to board early.
It also allows AS to possibly compete in markets they may have been shut out of before. It makes AS a stronger company and hopefully, that helps their loyalty members (you).