#4 She's going to have another on-screen role
Shane McMahon did mention that Paige will be sticking around despite not being General Manager. This means two possible things: 1) She's getting another name as an authority figure or; 2) She'll be a manager of someone or a team on SmackDown Live.
The obvious go-to would be for her to start managing Sonya Deville and Mandy Rose again, reuniting Absolution. It could make for an interesting storyline because there's bound to be tension between Deville, Rose and Paige for the decisions that the latter has made as GM.
It would play out well with Paige trying to earn their trust, or they could even turn babyface or be tweeners. Either way, there's potential in the storyline and those two aren't the only ones Paige can manage.
This is perhaps the most interesting possibility now because WWE will likely want to keep her on-screen at least until her contract runs out in 2019.