Really hard to compare Balance to ADKOT, but I think if you had to compare two such different albums I would probably choose ADKOT. However, wasn't a large part of that album old music they had written? Do they have it in them to write a new album? If so I would welcome it for sure.
To that point (and this is just information, Cram, I'm not slamming you at all): "She's The Woman" was on the early demo tapes (I forget if it was the Gene Simmons demo or the Warner Bros. demo). Interestingly, Dave sang it in the original key, so there. There are a couple other songs/snippets that can be traced to those demos as well (there used to be an internet radio show, "The Used Bin", and one of the guys did a really nice A/B from the album and the demos, and it was illuminating. The idea that they are just "recycling" is not in my view, accurate). Having said that, EVERY Van Halen record - including Balance - to date has had some song/snippet from either Eddie's archive or from the demo tapes.
If you believe Ed, he spends a lot of time in his studio, recording a lot of it, and supposedly there are boxes and boxes of "tapes" of riffs, snippets, songs, etc. Not all of it is "Van Halen"; he's done some soundtrack work - Twister, Wild Life, a porno movie (there's a great video online of him in the studio playing this piece that was in that porno; it's both cool and creepy in a way) so it's all over the map.
I will say this: Eddie is, along with Angus Young and James Hetfield, the artist I want to hear a solo album from most. I'd love a CD of just Eddie following his muse.