The issue somehow fixed itself today

I can confirm this

I added absolutely related issue about it the same day. But I suppose that all that sway increase part went a bit too far (see 2nd part of update in the issue below).
http://feedback.arma3.com/view.php?id=19701

Badlego, I could agree with your point about "working against sway as IRL", but then there's 2 points originating from this one:

First point is a bit more vague and it's about having a lot more sensory feedback to the whole process IRL, when you have enough information coming from your own body to hold the reticle more or less on target using only reflexes and 'instincts'. Compared to that, current system is highly random and unpredictable, you can see that in the first video attached to issue.

Second point was mentioned multiple times in the notes and it is not about exactly bipods, but about a general ability to place your weapon on a solid surface, effectively negating most of the sway.

I don't think that those changes made the game better; I suppose they could, but only with bipods or weapon resting mechanic. This also will give a lot more value to a properly chosen position (i.e. not only cover, but a cover allowing you to rest your weapon in the desired direction), which will be great in terms of tactical planning and will largely affect short and long range combat.