Forcing them to bring it back isn't going to work, because they know how big the demand for SU to return is. As a result, StevenBombs exist. They use up all the episodes that are air ready in a week, just so they can please the masses. Then they run out of episodes and we are forced to wait.
The thing is that demand is decreasing because of hiatuses and inconsistent schedules. Ratings were never higher than the summer 2014 through spring 2015 when SU aired weekly, averaging 1.9 million viewers and frequently hitting 2M. Steven Bomb #1 had about 25% fewer viewers than the episodes leading up to it, averaging 1.43M, and "Scabbard" and "The Message" are among the least watched SU premieres to date.
The summer bombs had averages of 1.81M and 1.76M viewers, then there were almost two more months of nothing. When the show returned in the fall, no episode reached 1.6M and the average was 1.44M. The Birthday Week did even worse in the ratings, averaging 1.38M. (All ratings data from Wikipedia)
I don't know how these ratings compare with other CN shows, but either SU is declining faster than the typical CN show (which is bad news for its continued existence), or all of CN's ratings are crashing (which is also bad news).
SU has a very devoted core fanbase, but the casual viewer will forget about a show after a break of several months. We even see on this forum people post "I'm done with this show if it's not back next month."
It's confirmed: http://steven-universe.wikia.com/wiki/Thread:531122#10
If "the plan" is as good as Burnett says, it would involve SB5 followed by weekly episodes with no hiatus in between.
That tweet is one of two things: (1) Burnett trolling, or (2) Burnett commenting on a planned schedule that CN changed their minds on. There's no genuine way that he would think the fandom as a whole would be "very happy" with 2+ months of radio silence. I think it's the latter: Remember that CN changes their schedule all the time with no notice. They changed SU's timeslot for the last episode before a hiatus on a few days notice, so quick that TV channel guides didn't know until the day of the show and people were worried it wouldn't record. Lauren Zuke even posted "New episode at 5:30" because there wasn't any clear announcement. So I think CN had a plan (if it is the bomb-heavy plan it seems to be, maybe once every two months) and then changed their minds and didn't tell anyone.