Maybe if we don't bother to assert ourselves about what it is that we want AND what we do not want - then we will have nothing to speak of tomorrow.
Yepa, if we go by what you seem to be recommending - there would probably be an unstable "International" of incompatible and contradictory organisations - which will be the subordinate of social partnership trade unions - consisting of selected purely economic organisations (some who can take part in decisions, others who are muzzled because a faction of reformers in control speculate that they are not big enough). Such an organisation exists already, it's called the red and black coordination.
If somehow FAU leaves IWA then USI could do it too... so lets see what CNT will do as their unions are not too happy with the current situation of IWA, and without FAU and USI, CNT will feel alone with small groups with very little possibilities of real growth (apart from SF). Maybe we are seeing the ending of IWA project and new things will come. Maybe we will learn from our mistakes and start over with solid feet in the ground.