My opinion is that anything is better than Sets and Seasons over the two prior years.. Nothing is worse that earning a card that expires or can only be used for a certain amount of time. (Yes, I get they created wild card spots, but it was still silly)
That being said, I do agree with the Original Poster. The content was there, but it felt like there was really never anything to do all year. There was so much of a push to ranked seasons and Weekend Classic, that everything else was abandoned. The move towards a one size fits all multiplayer program was the nail in the coffin for Events and BR too. There was no real point to play anything except for RS this year.. It made everything else pointless, and in doing that, took away the drive and motivation to play the game. Also Diamond Quest, which I enjoyed in the beginning, doesn't have the same appeal as mini seasons or Conquest. It was way more difficult to play multiple versions of Diamond Quest, especially when rewards really were not guaranteed. It just seems that there needs to be more of a focus on long-term play and trying to find new modes for multiplayer... This year felt like they actually regressed in that department.
In Closing
Events were pointless
BR was pointless (unless you are really good at the game)
Diamond Quest was too redundant
Coop is fun, but still needs something
New Modes for multiplayer
TA was really weak this year
Give the people something to try and achieve
I know this sounds crazy, but let people carry over something to the next game, even if it's minimal (can parallel one live series player to P3 on day one if you complete this mission)