I would say the higher your HIE the more likely you’ll make it through the entire workout intact. 
The last interval will definitely test your ability to perform under fatigue which brings up a potential issue.
Depending on your TL and experience with BT workouts in slope mode, I’ll bet some first timers might be cooked before the ending effort. If you got a BT already that may be the only max effort you’re able to muster (which is fine). If you pull off multiples, I hope a bump in HIE is in the cards. 
This article details the different ways to produce a BT and what’s most likely to change signature-wise –
Breaking Through the Xert Way! – Xert (baronbiosys.com)
The early sprint efforts determine whether you can exceed your Pmax (unlikely indoors). That would be a push-over BT. The others are pull-down BT efforts with the second and fourth at different MMP intensities. The third has the potential for multiple BTs using a set of Tabata/Ronnestad-style intervals. I like this type of BT effort but do best when on a group session as I’m more likely to talk myself out of “one more” on my own.
Also of note is this snippet from the Academy series –
https://youtu.be/ZN_nZrHs6Ls?t=603
For those unfamiliar this snippet explains how BT circles are coded by color and size on your XPMC chart –
https://www.youtube.com/watch?v=MM902T3ZNnk&t=1100s
As far as sharing goes, a few years back Xert was asking for submissions and those deemed worthy were considered for inclusion in the Standard library. Not sure if they are still doing that.