as to whether or not Addle will be amnesia or not, noone knows and its all speculation, but your reasoning makes no sense as to why SE couldnt add this into the game. (for most of the reasons others have pointed out in prev. post)
my biggest problem with what you have said is that break will not be game changing... really... really O.o. it may not be.. but i find that hard to believe.
granted SE will prolly make most of the things that we really would like to use it on immune to it. lets think if they didnt tho. by the time all the lvl ups are done blm/sch could POSSIBLY use ES/manifestation/kilaform(assuming same day,etc.etc.) break on <t>. normal manifest. spells last 60 secs+ if im not mistaken and kilaform boost m.acc. if you COULD get this to land on mobs that zergs work on then you are looking at the new zerg method. stack this with PD from alexander and your looking at a cake walk zerg.
obviously everything that goes along with break is, to put lightly, speculation. but like i said IF SE doesnt make HNM's immune to this it will be one of the most game breaking additions ever imo. we wont know till it comes out and is tested but isnt it fun to wish :).
as to break and addle, SE will let us have fun wishing/hoping/speculating but they will prolly just make them both very epensive play toys on low lvl mobs. /sigh