I'd say so yes, but for Kalos you have to bear in mind that fewer Pokémon were released compared to the other Generations, as X and Y only introduced 70 new Pokémon, although it did introduce Mega Evolutions.
For instance many Pokémon fans claimed Game Freak had run out of ideas for Pokémon when they reached Generation V, as they started creating a lot more Pokémon based off inanimate objects. The majority of Pokémon before Generation V were mainly based on living organisms such as animals, plants, genetics, DNA etc. However there were still Pokémon that were based off inanimate objects such as most Rock types, Voltorb, Electrode, Rotom etc.
But it sort of drawed the line with a lot of fans when they created Pokémon such as the Vanillite Evolutionary family which are based off ice cream's, Trubbish which is based off a trash bag, Garbodor which is based off a trash heap and the Klink Evolutionary family which are based off gears cogs etc.
A possible theory for why they introduced Mega Evolution is because they ran out of ideas when creating individual Pokémon.
So yes I'd say there's fewer Pokémon based on animals in the current Gen but that's partly due to there only being 70 Pokémon released. But when you've created over 700 Pokémon, ideas for new Pokémon starts to get extremely difficult.