I have a bit experience (~ several monthes (some evenings and weekends)) in Unity and I miss some features such as moving and rotating scene and the same about camera objects.
Sometimes it is hard to get what you need to do in Defold because the biggest part of manuals is about 1st Editor and I'm using 2nd edition now. Sometimes I feel that I need to use 1st edition too... Screenshots in manuals is too small and it is hard to get what parameters are set on them. I'm not a programmer and big amount of code examples on Unity made a lot of help for me. Defold has no such huge data base, so sometimes I have no idea what to do and shy to ask :)
What I really like about Defold - it is people. People are great - very positive and helpful community (if I'm brave enough to ask something).
I'm having one more trouble with gamedev - I'm not an artist or modeler, too :) So sometimes I have not enough inspiration to code because I see how disgusting my scene looks like) and after coding disgusting objects make disgusting things on the screen :)
the most time I feel myself like this :)