That's what I see too. An incomplete design that is practically screaming "LET ME EVOLVE".
However, because of the flower it holds onto constantly, I don't see it staying single typed.
Granted, yes, we are probably going to see a lot of Pokemon re-typed into Grass/Fairy, or vice versa, but I don't see the harm in this one falling into that pool.
After all, there is bound to be a lot of fairy type Pokemon this generation.
And before anybody says something that has to do with the second generation's inclusion of Dark and Steel, and how there was only a few introduced then, that may be true, however, this is a brand new, HUGE development in Pokemon, and, despite normally only getting between 100-110 Pokemon in even numbered generations, they are certainly breaking a lot of traditions and implementing a lot of new mechanics in this generation.
With the introduction of the Fairy type, I could honestly see as many as 130 new Pokemon this go around.
Which would be fantastic.