Does mission order affect/ruin the flow of the story?

Evening, All.  According to the CE Strategy Guide, just like it DA:I the story-based missions had an order and sequence to them and the story progresses as you complete each in sequential order....But in DA:I to an extent you could tackle missions for Agents/ Party Characters in any order (ie Lelianna, Dorian, Solas, Cassandra) and it wouldn't necessarily be 'spoiling the story'.  I mean, nothing would be revealed to you (the Player) ahead of a time when you would be ready for it, thus spoiling up-coming story events or taking the risk of putting those events out of order and making the over all story disjointed and confusing.

Case and Point with ANTHEM:  I have two missions going on simultaneously 1) Crafting the Shield of Dawn (given by Faye) and 2) the extension of the "manifold" mission of Mathias from the Demo.   Now, in the strategy guide I have, the Shield of Dawn mission for Faye comes at least three (3) missions prior to Mathias' mission and its continuation/conclusion.   But if I choose to do the mission for Mathias first......Will I be at risk of ruining the story?

Thanks

The Bunny Chaser