Sorcerer- Temper Incinerate size not working

I just upgraded my two handed staff with the temper that increases Incinerates coverage size and it looks like it decreased in size. Maybe take a look at this affix. It was definitely a buzz kill to not feel or see any difference. Makes me want to retemper into something else. It also seems like we don’t have that many options. I am hoping for an increase in temper manuals soon.

Thanks

TL

lots of confusion