Most scene MKV's (or, basically, anything with H.264 in them) are between 7-12 Mbps. Home cameras generally produce 12+ MBps H.264 footage. That is, 2500 is just too low for really quality, artefact-free footage.
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I agree if you are watching this on a 60" TV that is not acceptable bitrates. However when watching on a 10" tablet you will not notice this.
In general the movies look very nice. I personally prefer to watch 720p on iPad since the files are smaller and there is minimal difference on a screen that small going to 1080p.