Insights are useless as of right now. But I have ways to improve it.
The first one: Key Insight.
Key Insights give you access to more key rich locations on the map.
Now this might sound cool and all, but the key bonus tend to be around 3-5% in my playthroughs which isn’t that worth it for the price you get it from, even if a Shady Dealer happens to bring it up.
Plus you need to travel to said location, which may cost you Fuel, so the investment may not be that worth it overall, unless you use the system against itself
(which I guess is what most people do, but that ain’t fun to be honest)
This could be far more interesting, when combined with another special wave type: Key Rush.
Here’s what I’m planning:
Key Rush should be a set of levels that appear randomly across the entire map, with more chance of appearing in explored locations (said set of random levels refresh once per week, when it does, the locations change).
With Key Insight you can tell where those are in the map (hinted using a yellow key icon).
Since you get a ton of keys from Key Rush Levels, it would also be fair to raise the price of the new Key Insight up if you choose to do it this way.
To introduce this awesome new mechanic, on tier 30? players will get a free 1 day use of the new Key Insight so they could take it for a spin, and see why exactly does the key amount for this item is that high.
(Those who are already beyond tier 30? gets + 1 day on their current Key Insight if they have it.)
(30? since that number could be changed)
Also, on the topic of keys, I don’t think they should spawn on random chickens at random locations like in the other games since this could be abused to get tons of keys if you’re patient enough - and if this is the only way to get a lot of keys, then it’s not gonna be fun for most players, especially if they didn’t know they had to do this to begin with, like, waiting around all day to get keys just isn’t that exciting.