Dive into your creative stream
I'm surprised that there's a wave of people that don't like Caldarus' design. Personally I really like it and I think it fits his personality and backstory (that we know of so far) very well. Caldarus is a curious, contemplative and mysterious, regal dragon god. He's also been asleep for a very long time and has been weakened by something (or someone) in the past that we have yet to discover. Of course he is on the frail side, the dragon man's been through it and he needs rest!! So yes, I think Caldarus' design suits him wonderfully.