Performance Problems on Ipad Mini


i have an Ipad mini since 1 week. I have purchased Cubasis.
It feels a little bit too technical, but that is not the main fact i wrote!

The big problem is when I use micrologue sound, many sounds where not useable.
when I hit the second chord i want to play, sound stucks!

when i have two tracks, one drum track and one halion sonic. i press play and the cpu indicator wents to 50%.
I think sample instruments shouldnt use much cpu!

On pc i am a fl-studio user and thinking about migrating to cubase artist.

the main fact i trying cubasis is that the sounds from the fl studio app for ipad are not really good!
But the performance is much greater!