I have not read any confirmation on this:

Will T6-T9 have a player lockout like the current T1-T5 has?

These player lockouts from content really mess things up. My company has some people that like to play weekly (static) with each other, while some want to play with the company (static) and also help other friends with content.

What happens is the players that want to help others AND play with the company are being locked out of content because they cleared the content for the week. We all know what I am talking about.

Having no player lock out from content would only benefit the game...