The 'rule' about not crossing the centre of 4/4 time is an old one, but a good one nevertheless. It makes reading easier - which after all is what writing music out should be about.
Personally, i'm happier reading things like this with ties, where it can be seen simply that there's syncopation.
However - since the sound of drums generally don't have any or a lot of sustain, another option would be to write in a rest instead of the second tied quaver. If hands are used alternating, then that would show not to play with whichever on the 4, but after on the & of 4.