I personally don't think permanent member of the UNSC makes huge difference. It's more like a symbolic and India deserves it. India will become more and more stronger by each year passing with or without the seat. I don't know when, But we will surely become sooner or later.
Today, UNSC means USA and nothing else. Still after so many years, No one is capable to become next super power. We have good relation with 4 members USA, Russia, UK and France. Also, We have good relation with next candidates Japan, Germany and Brazil. In Short, Out of Top 9 countries with overall capability, We have good relation with all except China (neutral relation).
China is member, what does it make difference ? US 7th fleet is next to mainland China. Will it make any difference if tomorrow, God forbid, China-US goes in war ? NO.
What will change if we become permanent member of the UNSC ? Nothing !!
Israel is not the permanent member of the UNSC. but does it make any difference as it is most powerful in Middle-east ? NO !!
If India-Pakistan goes to war, will it make difference ? NO
US is selling fighter jets, Missiles to Taiwan. Can China stop ? NO
If US attacks any country. Can China stop ? NO
UNSC is just symbolic and doesn't make any difference. UNSC = USA.