I am all for finding ways to incentivize PVP for players that enjoy it and owning a Battle Keep an important feature in AOC again. But linking battlekeeping with access to T6 I'm not so sure about and frankly I don't see how or why that should even be an option. Forcing players to do stuff they don't enjoy is never a good solution (you as a very good PVP:er most know this better than most)