I've been playing this game too much or something because it bugs me that the zoo limit is so low. I'm pretty sure other players feel the same way since this topic is found on other boards and communities too.
Anyway, are there plans to update the game so that the limit is increased anytime soon?
The game was developed by Frontier Development and published by Microsoft Studios. I'm not sure who's responsible for future content and updates and neither have responded to players about it.