Why would you kill Keyword Difficulty tool? I use it many times per day for years now and it's most used Moz tool that I am using. It was quick, nice and compact tool. I don't know how I'll live without it!
If you are going to kill it at least fix the new keyword explorer so we have usable alternative. I have 27 inch screen and I have to scroll down to see beyond 4th result. 10 results don't fit on the screen. Much harder to visually compare results when they are not on the same screen.
Please make SERP analysis page more compact so we can see 10 results on one screen. It's was incredibly useful and valuable thing on Keyword Difficulty tool that helped to get a very quick impression of the SERP results.
Keep in mind there is a lot of Moz users that are not from USA that work on this market. Since results are localized this helped us get better impression on the real results users get in USA. For people like me, having Keyword difficulty tool where I can in few seconds get idea which websites are ranking for the keyword on US market along with DA and LRD's data was priceless.