I dont think so, he might be struggling and got rusts in his action and approach, but thats because he focused much on money and got commercialized, lack of practice and inefficacy rate of the cutters he bowls are factors he should deal with.
You can look at Shoriful how he improved as a pacer from being a worn out to a promising bowler. Form might be temporary and all of it can go wrong, but class would remain as it is.
I think the management should give enough time to Fizz until he comes back to his original form.
Hope for the best.