About low stamina states (or 0 remaining accels state, slow play), being with fatigue on or off : i think that the game would be more enjoyable in this state if there was only an incremental decrease in wings precision, not touching the power. That would preserve a gameplay wich is still dynamic and still allows for strong shots, though more risky of course. That would be enough imo to end the rallies by a fault anyways, and would at the same time encourage people to risk accels and preserve the chances for a good winner, keeping the original TE gameplay dynamic wich is much more enjoyable and spectacular, just with more aiming sensitivity. I think it would be visually more realistic as well, not seeing such a huge slowdown, wich is like reducing the court dimensions all of a sudden.
An example i thought about, would be something like -2% or -3% incremental precision gimp, for each additional acceleration beyond the limit, until a max of precision = wing power -20% or -30% is reached, and stopping there. Depends from where the precision starts though.. That could be decreasing to such a defined floor value, like 10 additionals accels beyond the limit, whatever the starting precision is, doing a calculation depending the starting power<>precision difference. The floor value may be different depending the control scheme used though (Arcade/Sim/Elite) ofc.