And to your point of limited race creation...how do you think it is limited? The options regarding goverment, traits, ethics, civics etc are staggering.......so what part do you have a problem with, just curious....
Sorry for the delay answering this.
I felt that while you do have a plethora of options do choose, you are severely limited as to their permutations. Racial traits cost way too much, and you way get way too few points, in order to make anything interesting. As a result, most races are either simplistic one trait species, or heavily flawed yet super advanced in something else, which is a pathetic and restrictive way to approach the diversity of the universe. I feel they could allow you to mix and match a bit more and not restrict your options so severely -- maybe by giving you different game modes with more or less points to spend.
The aesthetic creation is also awfully simplistic -- I hate how you get to choose between lists of names, but you can't choose a list for each category; it wouldn't be hard to allow a separate list for ship names, planet names, and individuals, instead of lazily clumping them all together onto one choice. Same thing with the lack of variations in species ship designs, and the simplistic flag creator that don't even allow you to mix and match symbols to create something more unique. Customisation wise, Stellaris has a long way to go.