Speed isn't really the issue - it's the accuracy of my work. Since I have to click and fill multiple fields when entering data, it's easy for me to miss one field, or forget sending an email out after the entry etc. That has been the main problem which landed me in the PIP.
That being said, the tool is very rudimentary and relies on clicking exact coordinates on the screen. If you so much as nudge your mouse the coordinates will be off and it won't do what you want it to.
No one on the team would have the understanding to maintain it once something breaks. For example, a task like adding a contact to an event we're hosting, it's coded to add it only to that event because I've programmed the script to open the dropdown, scroll and click specifically on that event name. The existing functions will be dated very quickly and they wouldn't know how to update that.
Considering I had to ask IT to allow the software specifically for my use, they wouldn't be able to do much quickly if my manager had demanded they modify it to work for them.
So, I'm not very concerned that they would be able to take it and use it after I leave. It's on a technical level that's not IT level, but above their basic understanding of computers unless they want to take time and learn AHK.
But given how my manager sees the tool, I'm not convinced they understand the power and usefulness of it enough to try and take it for themselves anyway. The old ways work fine for them, just not for me.