Of course, using the powers of the devil has it's benefits, you see a lot of things you could never imagine!
At least at the beginning, it seems nice ... Be it dreams, or whatever
That certainly applies to the
powers granted by the tadpole. If you use it, you get cool abilities; if you don't, you don't. Makes sense. But locking a significant portion of the game's content - the dreams, the companion discussions afterwards - behind its use isn't a good strategy because those things are
not tied to the deal you're making with this particular devil. It's just the devs deciding to develop one path more fully than another one. Not a great decision in a choice-heavy RPG.
You should still get dreams if you don't use the tadpole -
different dreams, ones where the tadpole is tempting or taunting or otherwise trying to convince you to use its powers. And you should be having appropriate discussions with your companions afterwards. This is more or less how the dreams worked in the first two games of this series (and you didn't get stiffed on powers depending on your chosen path).
Also, I really think your companions should be making their own decisions about whether to use their tadpoles or not instead of following whatever the PC does, but I guess that's not going to happen.
