Consider whether s_delta_blocks is necessary

[SeanMcOwen]

If we are only using the params for getting delta then we know it.

Also we can easily get it by just doing the first difference.

If we get rid of this we can get rid of delta blocks as a state variable as well

Putting it to tier 3 because it might save space

[jackhack00]

sgtm as long as removal doesnt screw us anywhere

[SeanMcOwen]

Switching to tier 5 since it probably only gives a bit of performance gain