I have also posted this feature request on Meta.
I recently reached 2k rep, so I've done my first few suggested edit reviews.
I reviewed this edit, and I noticed something. The strikethrough through the removed text obstructed my view of the post before the edit, particularly the negative signs (-) (other things may be obstructed too, but in this case I noticed the negative signs).
The text on top actually says "(-2a+4)", but the negative sign is literally indistinguishable from the skrikethrough. Given the already improper formatting in the post, it wouldn't surprise me if the original text actually just had a space (which are very common), i.e. "( 2a+4)", and this would look identical to "(-2a+4)" with the strikethrough.
All the other negative signs disappear too, and I also wouldn't be able to see if there actually were negative signs in the initial post where there are spaces.
This means I have no way of telling if the negative signs were added by the editor or part of the initial post.
My request: Remove the strikethrough through the removed text in suggested edits. The red block on the original side and the green block on the edited side are sufficient for the reviewer to see what has changed in the edit. The strikethrough unnecessarily obstructs view of the post.
I'm not sure if this post would be more suitable for Meta since it would affect multiple sites (or perhaps sites with MathJax, depending on what gets "obstructed" by the strikethough, although dashes on all sites are the same as minus signs anyway).
Given that I am new to the suggested edits review queue, and I couldn't find this being requested before, I would like to hear (read) others' view(s) on this too.