Hi and thanks for taking the time to make this interesting suggestions.
1. Yes, this page can be improved. I want to keep a generic homepage for the first time visitors. Nevertheless, for members, I could switch directly to the right browsing languaeg acording to first the brwoser browsing langauge and second the native langauge of the user.
2. Yes it could be like this. For now the ratio is calculated according to the number of letters needed on each language to say the same thing. What you propose is a kind of translation stock exchange system. I will think about it but that's not an easy one.
3. I think that's not very useful. Points are not so important in our contribution motivation. Most of us doesn't use the points they earn

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4. It doesnt appear anymore when your translations has been accepted. But without this warning we have so much moderation wiork taht I prefer to keep it. I will think abuot a way to get rid of this after you submited a couple of translations.
5. Interesting.
6. and 7. That's interesting too but who will pay the points for the translations submition? If we allow all wikipedia text to be translated on cucumis, the queue of translations to be done will be fulfilled with thos texts and we'll never end it.