What problems is Altium Develop solving and how is that benefiting you?
Everything in Altium is configurable and the configurations can be saved and recalled so that you never waste time re-configuring the options when working on different projects.
Draftsman makes generating fabrication and assembly drawings very smooth.
Altium 365 makes teamwork and collaboration very easy. I love the comments/tasks feature that lets you start a conversation around a particular part of the schematics or layout and discuss it with the team until it is resolved. It reminds me of a graphical equivalent of Git for software.
I've used the collaborative layout tools and the merge process is very smooth, which allows two or three people advancing different sections of the same layout in parallel.
Most of the processes we used to write in Word documents about our internal PCB footprint standards or where to place notes on the fab drawing have been captured inside Altium now so that you no longer need all this "support documentation" outside of your ECAD. Review collected by and hosted on G2.com.