According to the latest edition of the Wrestling Observer Newsletter, the reason why we see a clear difference in the entrances in NXT vs. the entrances we see on the main roster is because of who coordinates & puts them together.
As most of you are aware, in NXT, Triple H oversees mostly everything including entrances. So, when you notice a spectacular entrance during a Takeover program, it came from the mind of “The Game”. On the main roster, Vince McMahon & Kevin Dunn are the ones who coordinate & brainstorm the ideas for the entrances.