Subhadeep, I will provide you my brief list.
In Live view, 1) Spell check and many of the other features of the "Commands" menu are unavailable.
2) In Live view, Find/Replace (command/control -F) does not work.
3) In Live view, it is nearly impossible to left-drag through a webpage in order to copy/paste into another webpage.
Here are the Commands features in Design View
Here is the reduced list in Live View. Is it not obvious what is missing?
