As much as I would want too, I don't think I would tell him all the awful things wrong with his prequel trilogy. He's probably already heard it all.
I think I would say two things:
1. Thanks for Star Wars, I loved it, could you please release the original version? See, I know you think it was crap, but myself and millions of others liked it a lot. If you release the original version, literally every Star Wars fan you have will buy it, as opposed to the slowly dwindling numbers of people buying your "new and improved" versions.
2. Please, please, do not make this live action television show that has been rumored to be coming. I know, I know, you're thinking dollar signs and marketing everything on the show as a toy. Here's the thing, the risk/reward potential is not worth it.
You have slowly been alienating all of your fans. The numbers go down every year. You assume that new Star Wars means new fans, and in theory, that is true. But, media and entertainment have changed since your original trilogy. Children today, will not become the die hard fans you hope for, they will like it briefly, and move on to the next most popular thing. As you continually alienate your original fans, ( and I might add, they are the fans with the most spending money) you will earn less money.
A better idea would be to come out with a marketing plan similar to that of the Beanie Babies from the 90's. You release limited versions of original Star Wars merchandise, affordable yet hard to find. Unlike Beanie Babies, your fan base will not have a fallout, because the original merchandise will draw in old fans, rather than push them farther away. Money will come in like crazy.