I'm not sure Bram Peeters departure for Belgium is of much consequence, as Meuwly has lead her training for the last 5+ years, Bram focusing more on statistical analysis, as he stepped back from day-today 'directing' & coaching, which Laurent did.
I think the main thrust is simply exhaustion (mental + physical); her weeks illness in RSA (meaning she is a bit behind) & an intentional change in approach after 'only' getting individual bronze in Paris. I concede there is certainly pressure at home to set a WR at a home Champs, but I think they had already decided, with their new approach, she won't be peaking indoors at all.
Interestingly that despite an equally heavy programme last season (she may of even had more races..), Lieke Klaver is still running individually indoors. She also underachieved in her individual event, crashing out in the SF when she was aiming for the final. This tells me that it's the mental pressure side of things maybe, rather than the physical side, as the reason to Bol's decision.