If you like it a little more then I definitely think you should mess around with the DOF. I might be repeating myself, but notice on that spider of yours that I blurred, that none of the nearby grass is blurred for quite a ways. I think that might turn out to be kind of key. If you just START the blur about four feet from the spider (I’m using the scale of the human you showed) and VERY intensified the blur with distance, then REALLY (A LOT) ramp up the level of blur when you get really far away like those mountains, then you wouldn’t have to worry (maybe?) about :
…Because if the mountains are blurry,the player will just accept that and go back to the game. And as for things that are closer and somewhat blurry, if they want to see it completely clearly, they can just fly closer. I feel it might even add to the exploration of a level, like instead of clearly seeing the whole area you can go to, and thinking of it as a tiny meadow or something, not being able to see what’s coming would force the player into the mindset of the insect so to speak.
https://www.youtube.com/watch?v=CxvTzkeMGY0 - from about 1:00 to 1:30 they talk about how the murkiness of the ocean instills a sense of exploration, similar to what I am thinking with the blur.
(btw, that game looks pretty cool. I wish you could just play as any of the sea creatures!)
Hearing that actually makes me feel really good!