I thought that #MacGyver in season 6 be something like this
Mac and Riley will become couple from the start or become couple after 2-3 episodes from the start. They will be going on missions, Mac will hack build/hack things, like from season 1 #SaveMacGyver

Last episode will be like
Mac and Riley will be alone on the patio with firepit Mac will take courage and asked Riley to marry him. Riley would said yes, Mac will put ring on her finger they will kiss and
Mac: I love you
Riley: I love you too
They will kiss the end #SaveMacGyver

or
Mac and Riley will be alone on patio with firepit, Mac will asked Riley to marry him, Riley would said yes, Mac will put a ring on her finger, they will kiss and tell everyone. Everybody will be happy and celebrating. Than Mac and Riley will go to the patio, #SaveMacGyver

said something to eachother, at the end
Mac: I love you Riley
Riley: I love you too Mac
Than they will kiss and the end
#SaveMacGyver