Also, DP isn't really comparable because Ash had Pikachu, Aipom, Staravia, AND Turtwig by gym one, which was about 10 episodes later than XY.
BW might be comparable but it depends if they'll go through the gyms at the same pace. If it's similar, then yeah I could see why people would think Ash is missing a teensy something. But then again there were manyyyyy more possibilities in Unova.
AG is a fairer comparison. Pikachu, Taillow, and Treecko were just fine for the 18-20 episodes until Ash got Corphish. I think we're good until Ash gets closer to gym 2
So yeah, Serena needs at least a little something