Also, since the "Help" facility for users in SDP is non-existent or pretty much useless, we use the Description field as a help guide and rely upon additional fields we create to collect the information we require

It therefore makes sense to allow administrators - who use or might want to use those fields in this way - the freedom to disable the Subject and/or Description fields

Additionally, in many cases there are service request templates where we do not want or need to use the Description field at all so the ability to hide it from users would be most useful.