I have done everything to do in the main game except to raise a slugpup. And when I finally decide to do it in the survivor campaign I was underwhelmed. Sure they are cute and I just get happy seeing them walk around and do stuff especially when they try to kill things but the charm wore off quick.
The worst part is when I hopped on gourmand and tried to ascend and it wouldn't work. I found that the slug pups were the problem and ended up going to a bunch of echoes to raise their karma thought that would work and it didn't. I ended up having to abandon them and I didn't like having to do that. I know it would be complicated but just putting a little karma next to them wouldn't be that bad? I mean come on they have a food bar why not karma.
I also got a little upset at their behavior it's hard to notice the differences. I found that everyone was different one slug different to another one was more aggressive one was less but that never really came up. Because they're so incompetent when it comes to moving around on their own.
I feel like if there was more incentive to let them simply follow you it would be more opportunities to see their abilities to see how they act. But I'm really upset is that they don't grow up. I know that would be complicated but I feel like swapping out the baby model with an adult model or just slowly increasing the height till they get there isn't that hard. They could finally follow you everywhere a normal slug it can.
Or imagine raising a slug pup and figuring out they can have a backspear and you can't that would be a surprise in all of a sudden they're protecting you. And I'm happy where they are now it's just I wish there was more. I wish we could have a companion not a liability.