No, that's not at all a good decision.
Where do you live in Delhi? It's always better to join coaching near you.
I myself had experienced this, I used to go to South Delhi Centre from Faridabad, so yes you should join coaching classes nearby you only.
Yeah, that's all. See when you are a dropper, they expect that you already know the basics so they will mainly focus on problem solving techniques and methods.
If you want to clear your concepts as well, ask teachers to give you some time, and talk to them about your problem, they will definitely listen to you and help you.
Yeah it is some what biased, they will send less experienced faculty to lower batches.
Also, you can always perform good in reshuffling.
But I would suggest you to wait for your vmc results, as they do tell that which batch you'll be getting with your results only. (I know this in case you get founders in pitampura).