Okay, I will share what I wrote on another weather talk site since it applies here two ways, so this isn't plagiarism:
I think maybe this event would resemble a 15 April 2011 with an EF-4 or 5 added in to the event, MAYBE 2 4/5s at most. I guess the # of tornadoes in 2011 + the violent tornado from 08 April 1998. This would resemble a once-a-decade type of event but short of a superoutbreak.
I guess one other thing I'm trying to say, beyond the fact that I think 27 April 2011 is a generational/meteorology career type of even, is those less informed weather geeks (no shade, see below) who get high on the hype leading up to that event. Looking back thru these weather threads from 9 yrs ago, some of the bloggers & members kept hoping that the event WOULD live up to its potential, and went into overdrive once the storms began to fire.
Of course, that event did live up to 90-95% of its potential, so these overeager members did indeed get what they "wanted." However they had failed to anticipate the hundreds of deaths, the thousands of injuries, and the billions of dollars that would result from that superoutbreak. So, from a fellow weather geek (but more informed) like myself, PLEASE be careful for what you wish for. Once you get it, the guilt and sadness could last you a lifetime.