You questioned GE's depth, not their 'top 4'. BMC had riders of the quality of Beyer, Barton, Butler, Frei, Moos, Stadler, Stewart, Murphy, Nydam, Wyss, Zaner, House, Schar filling out their "depth".
And Stuart O'Grady still finished 10th at MSR and 9th at E3 this year, both while carrying water bottles for Fabian, so the old dog may still have a few tricks left in him yet.
Lib Seg - I can't double quote
The Olympics commitments more harms GE's chances to improve their ranking rather than to hold their ranking, as the track guys really don't bring many points to the team this year (except for Cameron Meyer's TdU points - and he could still easily perform there and re-set for the Olympics in August). GE's points come from riders - who while they once rode track - no longer target the Olympics and will be riding a full road programme.