Upgrades have been ongoing, and now I can declare completed:
The Bugs Bunny Show Page The Road Runner Show Page The Bugs Bunny/Road Runner Hour Page The Bugs Bunny & Tweety Show Page The Merrie Melodies: Starring Bugs Bunny & Friends Page
The Other Television Shows Starring the Warner Brothers Cartoon Characters
Not complete, but I doubt that the needed images will ever turn up.
There are still some sub-par images on Bugs & Tweety and Other Shows, but unless Warners releases all of the cartoons on DVD/BD, I doubt I can improve much more on what's there.
I've done quite a bit of digital painting to touch up the poorer images and bring them up to scratch. Intricate and tedious work, but necessary. One can scarcely hope to "trump up" cartoons when they're represented by images that look like eyesores.