1) If you want to look at it that simply, sure. The point of brackets is that they're a better solution to matching players up than the current Rank matching. Matching players up based on iLevel provides a more balanced playing field, that's exactly why Frontlines has an i80 cap, doing the same for Wolves' Den allows them to maintain match balance without splitting players up based on Rank. A Rank 45 in full liege could enter the i55 bracket and they'd be no better than anyone else in i55. The alternative is just having no system in place to balance the matches, and when someone in i110 enters Wolves' Den and gets crushed by someone in full liege, they simply don't queue again (pretty much the same issue Wolves' Den originally had). That or they just do away with the idea of progression in PvP, like I said originally. Have a single iLevel cap on Wolves' Den like Frontlines, make Rank purely a Title grind, and PvP gear purely vanity. That works too, I just think it's a boring alternative.
3) Not sure where you read that I think Grand Companies shouldn't be a thing. They should, Yoshida should just take a leaf out of XIs book and give us a Conquest style system so Grand Company verses Grand Company has actual weight behind it, rather than being a novelty. Right now it's just a novelty, I happen to enjoy aspects of it, but I fully understand why people dislike it given its effect on queues. Still, I'd rather them put some actual weight behind the concept than just do away with it. Long standing faction verses faction rivalries in a MMO tend to lean towards the sandbox style of content and can keep players interested regardless of new content (where as theme part content relies on constant new content), something this game currently lacks outside vanity. Given the rate of PvP content we actually get, they really should opt for sandbox style content over theme park.