I reckon the reason for this was because WWE realise how much they f**ked up by removing EX in place of a shit PVV called "Fastlane" with no theme as such... just a shonky name for a noneless PPV relating to "The road to WrestleMania!"
Hopefully they'll learn from this and bring EC back next year in Feb!
Leaving it off the road to Wrestlemania was actually a good idea.
The EC match is one of the more dangerous and demanding matches in the business. Turning it into just another stop on the way to Wrestlemania where it was a pseudo Royal Rumble just made little sense, especially since there were a lot of years where they were struggling to get stars involved or build any sort of heat for the match.
So keeping it off the calender and preserving it as something they could go back to down the road was actually a good idea.
The problem was they panicked and threw it on in the middle of no where. Not only did it lead to two very underwhelming and messy matches, it also damaged the appeal of Money in the Bank which feels very half-baked.