Nouman Ali Khan?

Neither Dr Israr Ahmed (RA) nor his (indirect student) NAK actually do Tafseer, they use Qur'aan as motivational tool and to encourage people. I was the same opinion as you as per Fazaile-Amaal UNTIL I read the works of Shah Waliullah (RA) on Qur'aanic education view inline and he (RA) differs with Hazrat Shaykh (RA) on the matter.

Also see what Shaykhul-Hind (RA) said on his return to India.

With the greatest respect and request for your duas. 

Off topic post: If Deobandees are not careful with their avoid him and avoid that Fatwaas and throwing people OFF and ON the Manhaj they will become worst laughing stock then the Madkhalees!

May Allah (SWT) protect us all (Ameen).

Last Comment on Noman Ali Khan (Insha'Allah):

I don't say this out of pride but I have actually listened to Dr Israr Ahmed (HA), read the opinions of Ulamah on him, read his responses (back to the Ulamah) and also discussed him with Ulamah in detail.

Positive:

Noman Ali Khan is a graduate from his Academy so the standard of education shines through.

Negative:

BUT Noman Ali Khan is NOTHING like Dr Israr Ahmed (RA) or his personal students in terms of get-up or Sunnah or attire or segregation or knowledge or know-how, although his impressive in the western world.

That I agree with. Dr Israr Ahmed (HA) and his students NEVER appeared like this without a big Beard/Topi and NO WOMEN at all! It is a fundamental policy of Tanzeem to have 4 layers of segregation between men and women famous phrase from Dr Israr Ahmed (RA) from his Dars of Qur'aan.

English (summary): Segregation is blatantly declared in the Qur’aan in Surah Ahzab, Surah Nur etc and if you want to discuss it logically then let’s talk about Sigmund Freud. He says that sexual (attraction and desire) is the most potent of human (base desires) even if a mother looks at her son and father looks at his daughter, it is through this. I say this is BAKWAAS (non-nense) but I agree with him that that sexual (attraction and desire) is strong so from my limited understanding, Islam calls for four layers of segregation:

1. Societal Segregation: Imagine that there is a barrier in society at every level between a man and a woman, there is no free mixing at all!
2. Home: The position of a woman is her home, that’s her work location and her domain of (influence). Yes if she to emerge then she must cover herself completely and utterly
3. House Boundary: Houses should be constructed in a way that there is an external Guest house where guests can come and the women folks can carry on with their household duties and activities uninterrupted. What I am saying is that male and female areas are to be separate! If a male guest comes then let him sit in the male section and even amongst close relatives if a Ghair-Mehram comes then he won’t be allowed in the inner (female) section. The only men allowed inside (female) section are brothers, sons, father etc the ones who are declared Mehram in the Qur’aan
4. Dress: The fourth layer of segregation is her dress, it must not only cover her whole body but should have two additional characteristics:
   1. It should be THICK so the complexion of the body are not evident
   2. It should be LOOSE so the contours and curvature of the body are not evident

Engineer Naveed Saheb appears on TV in Urdu and you can click and look at his style and attire yourself.

NAK is ofcourse nothing like this!