Sorry no. Except petition p5p to back out the core change that causes this and revert to 5.8.9 until they do.

Beyond that, realise that this is a few tens of extra bytes per array; if the array holds more than half a dozen scalars, then this new overhead just gets lost in the noise.

And Devel::Size is a development/testing tool. Once you've sorted out whatever malady caused you to go looking, and stop using D::S, then for the most part you won't be getting those extra bytes any more.

Finally, go through your code and change any references to $#array to ( scalar( @array ) - 1 ) and litter your code with large comments explaining why these should not be reverted.

I don't think that there is anything you can do to an ex-OSS programmer, if they leave behind time bombs :)