I did an article on the history of quwwali a while back, I think its not a bad thing, nor do I think using a different rythm in your vocals is a problem, what I see as a problem is Disco naats.
A naat cannot be played in a disco... unless the dance haal was serving as a masjid like in old times when they had not built proper masajid and would pray in large halls etc.
A Disco and a Naat are as unnantural as having an 6 speed automatic gearbox and a horse and cart... you cannot do both.
^ The fact they are even existant is worrying... you would be very suprised.
I used to think Naat and Quwwali were seperated by the fact one had music and the other did not... but today many Naats have music and this is an alarming trend.
I remember the trend of using filmi song tunes for na'ats ever since my childhood days.
I can't think of any right now.
But I remember thinking as a boy "Ye to Noor Jahan ke gaanay ki tune hai". :)
Rhyming nohaas on the tunes of songs I have most heard But this is first time even a naat khwan is caught red handed
Naat khwani being the second sacred, after recitation of Quran, shouldnt really be impure by the intervention of such parodies and elements of music involved. I remember there are a few naats in my mom’s cell phone, I cannot simply stand and want to tell my mom to stop playing them, (because it is just like “played” instead of naat being recited) but well I have to keep my mouth shut out of respect for her And its hard to convince her since for her, in whatever piece there is the mention of Allah and Rasool is sacred and holy. There is no second opinion anyway regarding these naats where music is added. They are simply a blow to the taste.
Qawali is something altogether different and separate.
Haven’t you hear Mufti Shoiab Mansoor’s fatwa : Music main koi burai nahin, lyrics ache hone chahiye… kinne kinne jana billo de ghar is bad, but kinne kinne jana Allah de ghar is great and quite motivating
But most of the time it does not click that the naat you are listening is copied from a song (based on songs tune). Like the naat I posted in OP used to be my favourite naat until I heard Lata’s old song. the lyrics are superb and its beautifully recited, but now whenever I listen to this naat, it reminds of that song.