The fee is no more extraordinary than the pay Musk asked for. Considering stockholders have now confirmed the $56 billion payment to Musk, I suppose although involuntarily they simultaneously chose to acknowledge the high fee for the lawyers, as they used a completely normal percentage fee.
The only thing that made it exceptional, was the exceptional amount granted illegally to Musk. Which was made legal later by stockholders accepting it.
Had they done it correctly in the first place, there wouldn’t have been a lawsuit against them, costing that percentage fee.