To start with the reason I think that scp 913 should be replaced, first is that almost if not everyone who plays the job doesn't understand what it actually is, now I am not implying that the job should follow the lore to the letter, but every other scp has some relation with their in lore counter part, 173 makes the blinking affect which fixes the whole moving while being seen and scp 966 is invisible, but 913 is not built in any way like its lore version, while yes it eats things but it is made so that people who play him just to kill people, the in lore version of scp 913 is not a mass murdering cannibal. this brings me to a few issues with the job a few problems that just make the job blatantly not fun.
* When scp 913 breaches it is always immediately blasted down by the random security members.
* I know research rp is not common to every scp but there is a reason for 913, for one he is not one of the well known, most researchers will just ignore it and toss the d class into scp 173 or any of the others. also even with people who are good in research rp ignore it because there is not research for it, okay an example, scp 008 is a zombie which has much more research value then just a random human who eats everything.
*And the last point I want to bring up is also just most people not knowing how to contain it when it breaches, this is not a fault with the rules but mostly because when scp 913 breaches it charges forward just spamming the swep and just like that the entire E-11 is dead.
My suggested replacement
The scp I think would be a better fit would be scp 629 or mister brass this is the link http://www.scp-wiki.net/scp-629 I'm not gonna give every detail but I'll only give the important parts, scp 629 would be a good fit because it would be the first scp that is cooperative with the foundation but doesn't free roam, this wouldn't be just a random free roam minge scp [We all remember 1370] now scp 629 is a sentient autonomous robot humanoid, now there is research potential with two scenarios, it was created by the mysterious doctor wondertainment and had been taken by the broken church at one point. so those are the two examples I could bring up, obviously the more creative of ye could come up with more, but now lets change over to a different side of things, he would serve as something that would want to be captured by Church as they do believe it to be an incarnation of their god, and also might be taken by TCS to be sold, as most of the little misters related to scp 629 were sold in auctions, but that does depend on if TCS does get merged to form Black lodge.