"l. Commercially available items used solely for the purpose of bundling or wrapping of 2-wire, 3-wire, 4-wire cables, and pneumatic tubing, for the purposes of protection, organization, or management are allowed. This includes but is not limited to electrical tape, cable carrier, cable track, etc. Note: it is up to inspectors to determine whether a component is serving a function beyond protecting and managing cables."
In your answer here, you seem to give a bit of a contradiction that is confusing at best.
You make the point, though grammatically ambiguous, that the rule is solely for the purpose of "solely for the purpose of bundling or wrapping of 2-wire, 3-wire, 4-wire cables" and all clauses after that are subordinate clauses. It would seem, though, that this is a series given the commas and the use of "or" before the last clause.
I must concede your interpretation but then you suggest something that seems to violate your own interpretation. You said "Electrical tape or shrink tubing may also be able to achieve this goal (especially if combined with strain relief technique described above)." The use of electric tape is subject to the same constraints and is even specifically mentioned. It would seem that if you can use electric tape for strain relief (purpose of protection) then hot glue or Sugru would also be just as legal to use.
Given the construction quality of the Vex 393 motors, I would hope you would reconsider allowing these means to be used solely for the purpose of protection of the wires. Once the wires are pulled out of the motor, it is my understanding, based on previous year's Q&A that reconnecting them internally is not legal for VRC competition. If that has changed, that would be another way of helping teams deal with the high cost of replacing expensive motors that come apart all too easily.