Calm down dude, nothing here to get heated up about, but I still feel that Insight does do a bit more than you think it does.
all the crazy things insight does at different levels.
1 - Bath Messenger's become available
-Beckoning Bell is given
- Doll comes to life
- Mad Ones Spawn at Hemwick Witch fight
15 - Church Doctors gain buffs to their weapons and additional moves
- Gehrman will talk in his sleep
- Mad Ones will spawn in predetermined places throughout Hemwick Charnal Lane
30 -Winter Lanterns will begin to sing in an off key tone from a distance.
40 - Lesser Amygdala's can be seen throughout Cathedral Ward before Blood Moon Phase
50 - New Song will play in Hunter's Dream before Blood Moon Phase
60 - Mergo's cry can now be heard throughout the town, until you kill Mergo's Wet Nurse.
- You can buy a lot of trout with it.
- You use it to summon allies in multiplayer.
- It also makes Frenzy a bigger pain, so if you want to play a challenge mode, then you can add having 99 Insight to make certain parts harder for you.
I don't really know what you were hoping for, either some glorious ending or for the stat to scale with a weapon, but frankly, I feel it was a pretty snazzy mechanic and still has some cool potential to grow. Even if they were little things, the lore of this game is what brings me here, so the fact insight adds to that makes it pretty special imho. It still fits well with the Lovecraftian themes of "experiencing the true world" and the madness it brings.
I also liked that it basically served as a better version of the Humanity stat from DS, which I always felt was more trouble than it was worth. Insight actually did some cool things in the game's world besides being a pure mechanical stat with some vague lore behind it. So I've always seen it as an interesting evolution of a concept and one I feel Bloodborne utilized better.
I would be curious to know how you feel it could be improved beyond netting you more things after 60 Insight.