Still has problems with biomes

Dear Mojang, I love minecraft and it is so AWSOME but on my iOS 9 iPad mini I started a new world in minecraft and spawned in a jungle, the big issue was that while I was in the jungle biome it lagged really really really bad and kicked/glitches me out of minecraft and Im back to my iPad mini home screen. Please improve iOS 9 devices to run minecraft better especially in big biomes such as jungles etc... Also another problem, When in one of my worlds when Im building a house and place a bunch of glass while building the game gets a little laggy. I hope you added the missing sound files to the wolves in minecraft howl 1 and 2. And I know the Better together update is coming soon so Mojang, since its a big update you have to fix BIGGER BUGS. Please fix these updates before you release this update. ~ thank you Team mojang, I know you can do it. Do it for everyone. This is the best game ever.

Pet Ninja 45689 about Minecraft: Pocket Edition, v1.1.5