The option of monsters getting tougher as you have more and tougher guardians is toggleable, so If you dislike the feature, you can simply turn it off.Sounds promising, i'll be waiting with pleasure.
I am not sure if you should make the game too hard if more guardians are following you, but if you really decide to do it anyway, it needs to be done in a neat way, or it'll lose the necessary to call guardians in the first place, like if calling guardians for help only makes enemies harder to kill, you might think "why am i calling them for ?" "This is supposed to make my life easier!" As for me, i'm a casual player, too hard or too easy are both bad, as for some players they want challenge, they want their lives to get threatened, they think that's fun.
Now, i might give some suggestions, you could at least look at it and be more creative. In this mod, the fun part is the companionship, mayhaps you should focus on this, to balance things out from this point of view, not by making mobs harder to kill, but by give guardians more personalities more personal lives, making so they could get "tired" thery get "bored" they need their casual times as well. maybe you could make guardians so they can't follow you all the time, after some time in the company, they need to rest for a day or two, like your sayings above, they can sleep in bed or something, to force them leave the party of slaughter. And even better, this way you get the chance to call upon those un-invited guardians to your aid, so all guardians can participate in the journey. Not always old faces, not-so-popular guardians need love too. By doing this, you get to train all guardians (you have to), their progress alone call make the game more must-earning, cause new guardians are quiet weak, they would need time to build up, and to aviod losing guardians in crucial parts, players would think twice about if they would bring all the guardians to their side all the time. It's not enough, you can also give them death counters, if they die too many times in a certain period of time, they get wounded, and can not be called for some time, you need to heal them using healing items, this way we must treat them more carefully like real fellas and not let them roaming around like a mindless killing machine. But this idea may be hard, cause it needs to be done with new AIs and new behaviors, the coding difficulty would be hard, and too many data reading and loading won't be nice, but my point should already be clear, not by making the game hard but to give own restrictions to the mod, and not losing the fun even adding more fun to it. Yet ideas are ideas , some may never be done, i don't know how these can happen from coding circumstances, and your personal likings as well.
I really like this mod, it gives a live aura around my character, a progress feeling, not just more DPS or more hp, it's a buddy by your side, in a world of lonely heroes, that means a lot.
By the way, after some coding, maybe you can ask around the forums and use some new spicy sprites, there are people doing this in the forums, it would make the mod more appealing to some people, and get them interested, though me personally i don't care that much, game mechanics are more important. With all that saying it's your creation no matter what. You decide.
And that idea of making so guardians doesn't aways are disponible to be called is actually great, of course It will need to be optional, but If one wants to give some rotation to the guardian usage, that's going to be great. I'll check out later If I can add that.
Weird, she wasn't supposed to disappear. There is definitelly something wrong there, I'll have to check that out.yeah every time i talk to her it says that i startled her and disapears, then after some time she is on the fire again.