ignoring the Tadpole powers also meant you didn't get any cinematic, story, or anything. You never met the 'desire' (making their creation as pointless as it gets).
Yeah, this was my main issue with the whole thing, which I'm pretty sure I grumbled about on these forums back in the day. You miss so many important moments with your companions and a fair-sized slice of the plot, but nothing replaces that. I couldn't care less about special powers - I'd just like an equally rich story. I'm still unsure whether they've actually addressed this issue (partially yes, partially no, it sounds like?).