Wisconsin

Viral mutations is not linked to actual infection rates. A mutation occurs with individual first, and then transmitted to another individual whose DNA has the same receptor ability.

What you may be suggesting is that, 'herd immunity' will be delayed as more variants are found. That is true.
But, there isn't enough data to claim that more deaths or illnesses will happen, from the variants, simply because more people are repsonding to the variant. The variant is mainly showing specific transmission methods; more lung than throat, more nasal than throat..etc.

Yes, there will be more mutations, but until those actually happen, and tracking has a means to identify each variant's method of infection; there is no way to predict more death and illness.
A variant can show up and have no effect. Some mutations can actually wind up doing nothing at all. Have we had those yet?

Not sure where the 'no effect' variants are being compiled, but they've got to be out there and you've touched on a very important thing that media needs to educate us all about.
How do our bodies react to each variant?
What are all the variants?
Will variants cause the vaccines to require re-formulation and update injections?