Probably just them wanting to limit the amount of people around the PC throughout the week and all the real focus going towards the main roster because of Mania.
Wouldn't be surprised if NXT officials also figured people likely are going to get bored of the same format for shows if they just did what RAW and Smackdown did this past week. At least in RAW and SD's case, they don't have a rival show airing at the same time so less worry of viewers tuning out.
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