Obito:
Senju DNA & Woodstyle
Mangekyo Sharingan
Rinnegan (has only used it once)
Kamui
People continue to overpower Obito. If he is as strong as people make him out to be, why create akatsuki? Why not just capture all of the biiju on his own? Probably because he couldn't?
Obito did not like Itachi. He even stayed away from Konoha and from Sasuke while Itachi was alive. If Obito was as strong as people make him out to be, why didn't he try to kill Itachi? Probably because he couldn't?
Obito was shown to be a little nervous and weary of Kabuto. He even seemed nervous when Kabuto revealed Edo-Tensei to him. He even went as far as to ask how to defeat it. Why? Because he didn't trust Kabuto. Fair enough. But... If Obito was as strong as people made him out to be, he wouldn't have been nervous of Kabuto.
Obito was shown to be afraid of Madara returning. If he is as strong as people make him out to be, why didn't he just get rid of Madara? He can't.
Obito fought Minato did he not? Back then he had Mangekyo Sharingan, 9 Tails, Wood Style, Senju DNA... BUT he still lost to Minato, did he not? Minato's name is still as famous as it was before he died. They even had flee on sight commands if Minato entered the field. I don't care if Obito was 15 years younger when he fought Minato, point is... he had all the same stuff he has right now and still couldn't beat Minato.
I know that Obito fanboys are going to say "Well, he was young and inexperienced..." Do you really think he could take Minato now? Minato has FTG and his Bijuu Mode, with these two things alone, Minato's speed is a hell of a lot better than Naruto's now, he gets a strength increase, defense increase, etc.
Kakashi:
Mangekyo Sharingan
Master of 1000's of jutsu (hence his nickname "copycat ninja)
Extremely good battle tactician and well trained in many forms of combat (hence his position in the war)
Kamui
Kakashi lost to Itachi, he lost to Nagato, etc. Look at Obito and Kakashi right now. Their handicap (Kamui) is no longer an issue anymore. Since they aren't using Kamui, they are just fighting with everything they have. THEY ARE EQUAL! People need to stop overpowering Obito. He is only strong because of Kamui. As you can see, without it, he is not better than Naruto, Sasuke, Itachi, Nagato, Minato, Hashirama, etc, etc, etc. Without Kamui, do you think that Obito could defeat Nagato's Paths? Without Kamuing his way out of situations, do you think he would be any match for Itachi? Without his Kamui, he is put down on the same level as Kakashi. That's it. Simple as that.