It's pretty simple:

While Jay was securing his alliance with the UK Royals, several deals were part of the handshake -

*Calvin Harris
*Rita Oral
*Kylie Minogue

(to name a few British imports)

This handshake allowed the mentioned artists to trade/do business within the US without stepping on the toes of the "international Beyonce machine" and avoiding conflict of interest -

Jay's people fall under the worldwide Universal umbrella (pardon the Rihanna pun, appropriately so...now boss of her own subsidiary label under Roc Nation) and dodging to the Beyonce machine, Parkwood/Sony/BMG. Surely, Jay plays a silent partner in Parkwood Entertainment.

Rival companies

So... If Kylie were to play on the "winning team" and allow Roc Nation take the wheel, she already knows how much marketing and promotion is invested into the Beyonce machine.

(See how Adele escaped? Columbia kept her out of the way during this moment....otherwise, they would have rushed another album as if she were Rihanna)

No female artist would have been as large as Beyonce. While we "sit everyone else down" because their respective labels don't have the same budget to compete, we (Roc) will allow you to work but it will not supersede my wife/other investment.

Kylie was probably promised 2-3 singles with promotion and tour support, no doubt...killing the merchandise department due to her own legacy.

The only thing great about this album was the second single 'I Was Gonna Cancel' produced by Pharrell (Again, a large portion of her recording budge was spent to ensure US success by working with a guaranteed US chart topping record/formula)

The plan wasn't for Kylie to succeed with 'Kiss Me Once' but more Roc's UK alliance to keep her relevant while the Beyonce machine continued to run everyone off the road, full speed ahead.

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Tidbit: Two years ago, Roc Nation hosted their pre-Grammy party @ House Of Blues (Hollywood) - the whole roster was there to support, including Kylie

Jay/Solange/Beyonce were all seated upstairs in VIP w/their entourage. (No mention of behaviors)

Kylie had a reserved VIP table, floor level with the crowd, minimal security - seated with a few friends and crew. She drank water all night and left politely before the crowd.