I'm probably way out with this, but leaning to a thought that he and team are not that worried about the gap to O'Connor and to Mas as thing are evolving to right direction or stay where they are atm. Maybe not even planning to grab red jersey at all before the tt.
Wouldn't it be the optimal case to arrive to the final tt like half a minute or handful of seconds back, slowly eating that gap away these last days? No need to defend the attacks, no need to sit and stand in interviews and dopingtests too long and all that gc leader jazz.
When you know how you typically handle tt's against this top5.
Roglic better gains every sec asap. With his limited prep it‘s not clear how he‘ll manage week three anyways, so waiting could be dangerous.