to start out, this argument is coming from someone who has been scouting for a VERY long time, so hear me out before you dismiss it as a stupid argument.
i looked at the dropsuit table that CCP released a while back, and it appears that the scout ak.0 has the same module slot layout as the scout gk.0 (2H 4L).
it seems that most people who say the amarr scout is going to be underpowered are referring to it's bonus, or moreover, how USELESS it's bonus is. for those that don't know (which you should by now), the bonus is +5% to maximum stamina and stamina regen per level.
those who see this bonus as pointless obviously have:
a.) never or rarely played as a scout
b.) intend to build it like an assault suit
if you've ever run a speed tanked scout, especially using a shotgun, then you know how important it is to use your stamina wisely. if you don't, then you will die on many occassions due to having no stamina, and as a result having no ability to avoid gunfire.
this is where this bonus will come in handy. you get more stamina and faster stamina regen, which is about as useful as it gets to a scout who actually builds his fit LIKE A SCOUT.
let me give you an example. i've taken the time to build a fit using the
Scout ak.0 . since you don't know, this build almost exactly mimics one of my scout gk.0 shotgun builds, but is all around better. it has more ehp (551 ehp which is WAY MORE than enough for a speed tanked shotgun scout), decent speed, good stamina BECAUSE OF THE BONUS, and it can fit a cloak and REs. that is quite literally all around better than my scout gk.0 fit that this was built off of.
maybe this is too slow for you, and if that's the case, i completely understand, as i'm a bit of a speed junky myself.
here's a fit of a faster
Scout ak.0. it has speed comparable to that of a scout mk.0 now, but with more ehp, stamina, and shield depleted recharge time. plus, you have a pretty even amount of armor and shield, meaning if you're facing a certain weapon, it will have trouble getting through at least one of you defenses, be it armor or shield. again, quite literally better in every aspect than a scout mk.0 now.
i hope this has shed some light on why the scout ak.0 will in fact be on the same level as the other scouts. on top of that, you will be able to achieve over 1000 ehp on a SCOUT with this suit, though if you do, then you're not a real scout.
TL:DR
stop trying to abuse the scout ak.0 by building like an assault suit and you'll find the bonus to be VERY useful. and if you do decide to try to abuse it by building 1000 ehp on it, then don't get upset because the bonus doesn't allow you to abuse it further.