After a recent re-visit, I am still pleasently surprised by how much I enjoy Fear Inoculum—it's a super solid album.
I'd probably rank it third (behind 'Lateralus' and 'Aenima'), but I enjoy their whol catalog, and don't find a ton of drop-off from 'best' to 'worst'
As for the wait, I do not begrudge them one bit. The older you get, the more time becomes a commodity, and as a fan, I'm a firm believe of the whole 'they don't owe me anything' mentality. Happy to have the music I have, and will be happy to have more if/when it comes, but what does or does not happen in the future does not impact my present enjoyment.