And the snippets from the 2A book looked like a re-hash of Crucible (set in the 2A).
Do you mean 'Genertela, Crucible of the Hero Wars'? If so, that is definitely a 3rd Age sourcebook, not Second Age! The reason use old-timers are getting excited about the MRQ Glorantha sourcebook is that (with the exception of the Rough Guide to Pavis fan pub), this is the first full sourcebook dedicated to the Second Age.
Agreed that the companion previews look pretty bland - however, I'm expecting that to contain 'rules that should have been in the core rulebook if the core rulebook had been bigger', so nothing too exciting there!
I must admit I'm getting a bit concerned about the total price of all this stuff, however (I know this is a different thread...). Unless I see some excellent material, I think I'll be stopping with the core rules & Glorantha books, at least until I see how things pan out. $200 is just way too much to shell out on a prospective ruleset. Unfortunately I'd have to buy the Core Rules, Companion, Glorantha, Monsters, Cults, and Legendary Heroes just to be able to play my current campaign with the new rules...