Operating with a blank calendar and flexible hours on XATA is a LOT different than the nuanced XFAI plan with projected LIT/HIT/Rest days.
I posted a chart outlining the differences in XATA vs XFAI here –
Onboarding steps for Xert trial users and newbies - General - Xert Community Forum
With XATA BBP you’d be starting in Build phase due to the target event date.
I prefer the “freedom to ride” inherent with XATA’s day-by-day choices. Others prefer to follow a predictable schedule. YMMV
You can also try setting a Goal for Mixed Rouleur and see how those table views compare to the Event forecast. Push the watt gain slider a few clicks past green into yellow or red text warning and see if a viable plan can still be forecast.