I agree that CT should no longer have a gear lock so that players can actually farm the content and possibly fix the issues with players leaving the dungeon after acquiring their item piece for the week. Coil having an item lock out per turn would help with overall gearing your static team for 6-9 as well as helping out FC members to experience these turns as well as gear them up for future teams for future coil turns.

However as someone has mention before Coil should have a pretty high ilvl requirement to prevent players from just skipping other contents all together just to farm ilvl 90 gear.