Yes that sounds like a smash!
Perhaps a re-revival of anamorphic is on its way!
Here is an interview with Uematsu Michiharu from Panasonic about the GH5. Dynamic range is also discussed and what I get from it is that it is pretty much the same as the GH4. Disappointing but true!
It is disappointing that the dynamic range has not improved.
The best way is process VHS is:
1. Get a good VHS player preferably with TBC
2. Digitize it interlaced with any VHS sharpening and noise reduction set to the minimum.
3. Make sure your level settings are correct (to prevent avoidable blown out highlights)
4. Capture it with a high quality codec.
5. Line double it to 50/60p
6. Remove any remaining deinterlacing artifacts
7. Apply light noise reduction (if applicable)
8. Apply slight color correction as the colors are likely a bit faded.
And that's all you can do!
Sharpening, VHS is already oversharpened.
You can upres. the results but it will not improve the quality.
Avisynth and Vapoursynth are great tools to accomplish all this.
Instead of planning this from a blank slate you could defer the question of delivery by first getting the technicals out of the way.
You would need to scan the slides, name them and do basic color correction.
Then you would want to organize the material.
Once that is done you may develop some great ideas on how to deliver it to an audience.