It still seems kind of shaky to me. An ASS uses the whole Maneuvers Readied/Known mechanic for casting spells (that's what "as if they were maneuvers" means). Why do you think that things that change or expand upon the Initiation mechanic necessarily don't apply to spells using that mechanic? I can see where you're coming from (they refer to 'maneuvers' which you don't have), but I don't think it's as cut-and-dry as you're making it out to be.
I think it's time to actually sit down and think about what "The arcane spell is “cast” as if it were a martial maneuver" really means. We know from grammar that what you're casting is, in fact, an arcane spell, and inherits everything that entails. The only thing that changes is the method of casting - they're like maneuvers. What does "cast like a maneuver" mean? Time to go read Tome of Battle Chapter 3.
Martial Powers
You can use your maneuvers spells as many times per day as you like, but you have to re-ready them between uses. You use the recovery method of your class, or take a 5 minute rest to recover expended spells.
Readying Maneuvers
The number of maneuvers spells you can ready at one time depends on your class and level. To ready maneuvers spells, you require a brief period of practice, exercise, meditation, or prayer. The exact nature of the exercise or meditation depends on your martial adept class, but each class requires 5 minutes of preparation time. Since each martial maneuver spell requires a precise combination of techniques for gathering inner energy, training muscle memory, speaking prayers or catechisms, and even focusing the mind on specific concepts or analogies, most martial adepts can’t keep every maneuver they know at the forefront of their minds. You do not need to be well rested to ready your maneuvers spells, but you do need to be able to stand and move without restraint. As long as you are not physically disturbed during your exercise and meditation, you can exchange your previously chosen set of readied maneuvers spells for a new set of readied maneuvers spells. Unlike a wizard preparing her spells, you cannot choose to leave a readied maneuver spell slot unfilled.
Initiating a Maneuver
To initiate a maneuver or a stance cast a spell, you must be able to move. You do not need to be able to speak. You initiate a maneuver cast a spell by taking the specified initiation action. A maneuver spell might require an immediate, swift, move, standard, or full-round action to initiate. The process of initiating a maneuver casting an ASS spell is similar to that of casting a spell or manifesting a psionic power, although there are some key differences (see below). You can only choose to initiate a maneuver cast a spell that is currently readied and unexpended.
Concentration
Unlike with spells or psionic powers, you need not concentrate to initiate a maneuver or stance cast an ASS spell. Furthermore, if you are injured or affected by hostile spells, powers, or maneuvers while initiating a maneuver or assuming a stance casting a spell, you don’t lose the maneuver or stance spell.
Now, this does lead to come conflicts between the inherited rules for casting spells, and the rules you're instructed to use for casting spells "as if they were maneuvers." Do your spells require concentration? Do they have their normal components?