I think juries are being given way too much power in the contest. Mathematically, it's 50:50 between jury's and televoting's power in voting but in reality juries are given more power to change the results. First of all, the national juries consist of only 5 members so they have a huge influence (20%) on the average rank and therefore the place in jury voting. On the other hand, 10.81 million people watched the contest in Germany in 2014. Let's say that only 25% Germans voted (2.70 million). Your vote would, in that case, have the influence of 0.000037% in voting. That's a huge motivation to vote, isn't it? Furthermore, that also makes the juries opened for bribes, cheating and whatnot. I understand the diaspora voting gets out of the control in some countries but the juries do not solve it as well. All Moldovan jurors still ranked Romania 1st. What are the chances for that!? There's a space for progress but then this kind of voting has to be punished. On the contrary, Albania won the televoting in Italy (obviously because Elhaida won The Voice in Italy) but jury ranked it 25th so it got nothing in the end. Not to mention a bit too similar voting patterns in a lot of national juries. What are the chances of finding 5 persons with a very similar music tastes? Juries should consist of much more than just 5 people and with different music tastes. Juries are also supposed to be professional. I dare to ask how the hell is a 17-year old girl Isa from Sweden any more professional than any other Swede? Don't misunderstand me, I have nothing against her being in the national jury but the jury should not classify as professional then.
I'm not trying to say that juries should be absolutely kicked out of the contest but I'm in favor of abolishing the full ranking system, punishment for some obvious cheating in national juries and the juries being consisted of more people with different tastes. In that case, 50:50 system would do pretty well in my opinion. With this full ranking system, 70:30 or even 75:25 would be much better (in favor of televoting of course).
After all, televoters have shown they appreciate different songs and styles and have be proven as way less conservative than the juries. The juries were supposed to be the ones who are not influenced by graphics, diaspora voting etc. but it turns out it's the other way round.
Edit: I forgot to say that some songs would still get a 12 despite the diaspora voting. For example, Montenegro would get a 12 from Serbia no matter Montenegro was or was not the Serbian neighbour.