1. Shunshin is available to Lee as well. You make it sound like Sasuke is the only one that has it. Don't tell me that Sasuke is better in using Shunshin compared to Lee as that is just pure speculation. Not to mention that Lee still has his sake and gates to add.
2. Hachibi wasn't exactly using the bijyuu's power when fighting Juugo. Besides, Lee can avoid Juugo's attack as well. It's not like Juugo is good in taijutsu like Kimimaru was. He is just an average taijutsu user with brute strength.
3. No but his 360 degree helps him to avoid direct eye-contact. And yes, his chakra control makes genjutsu rather useless against him.
4. Keep the his eye on the Kaiten = the flame doesn't go out ?? That's just the most ridiculous thing I have ever heard. For that to happen, he would be using Amateratsu continously. Let's see how long he would last then. About the heat, when was Amateratsu said to be that hot ??. It was just said to inextinguishable and it burns for 7 days and 7 nights. Even if it is hot, I'm pretty sure Neji can outlast Sasuke's chakra capacity to use Amateratsu without stop.
5. Doesn't matter if it even takes time to stop. The fact is once it is stop, Amateratsu won't have anything to burn. Thus it would disappear. If Sasuke repeats, Neji does the same. Bottom line here is Sasuke's chakra capacity won't last.
6. About getting cooked from Amateratsu, that's just your opinion and speculation. Don't make it sound like a fact. Seriously, if every debate with the Uchihas are going to be how Amateratsu owns everything, then we might as well not debate as it is getting pointless.
7.
http://www.onemanga.com/Naruto/390/03/ <---- this pretty much explains how Kaiten is capable of protecting Neji from Amateratsu which is non-spammable.
8. Kaiten can be used rather fast as shown --->
http://www.onemanga.com/Naruto/101/04/
9. Kaiten is some sort of barrier which is able to protect Neji ---->
http://www.onemanga.com/Naruto/101/04/
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I don't really see Suigetsu losing to Tenten either. But she could keep him busy until Neji is free to help her. Lee IMO isn't going to help much against Suigetsu unless he actually manage to attack him non-stop to the point that he couldn't even regenerate which is almost impossible. Though if TenTen have enough explosive, she could pull it off and drain Suigetsu.