My PADI wreck class was pretty thin on substance. We did the dives but didn't spend much time on why, how, and what to do if the stuff hit the fan, how to ID a wreck, or how to map it.
When I became an instructor I looked for an agency that allowed me to add as much material as I wanted, use outside materials, and spend as much time talking about the risks, wreck identification, mapping, noting hazards, and offering limited penetration in a "tech lite" kind of way.
The idea was to offer a class that was actually prep for a technical wreck course. So it's 6 dives, 6-8 hours of classroom, line handling on the surface and under water. It also looks very closely and spends a lot of time looking at how wreck diving can kill a diver. That's actually the first thing we cover.
Much of it also takes place in relatively shallow depths to offer lots of bottom time. There is a quarry that has a lot of underwater items that can substitute for natural wrecks and offers a great variety of things to concentrate on.
A recreational wreck class should cover, as much as possible, the reasons that a recreational diver in a single tank has no business in an overhead.
I want to have a class that offers mapping, research of the wreck, identifying entry and exit points safely. Identifying entanglement hazards, lost ascent line drill (shooting a DSMB or bag for upline), exterior exploration, buoyancy, trim, navigating the wreck, and running lines. It should include tie off practice and instruction.
If there is going to be any penetration lines must be run. No exceptions. Use of markers on the lines. Redundant air sources, air shares out of the wreck, and choosing routes that allow divers to swim side by side. Otherwise, they don't go.
I'd also want my instructor to have technical wreck penetration training. Ideally, they should be a technical wreck instructor.
Recreational wreck diving that involves any kind of penetration should not be approached lightly.
The students should be evaluated first and if anything seems off -nervous, prone to anxiety, poor buoyancy and trim, not intimately familiar with their gear, etc. Probably should rethink taking them on for wreck training.
I have met some divers that if they asked me to do a recreational wreck class for them with the limited penetration I'd have to tell them no. I don't think they are ready for that yet.
I also don't think that the first wreck dives a diver does should be on deep wrecks (80-100ft). Not enough time on the bottom to build a skill set that will be ingrained.