Sean, remember it is only early days with your new pup - so - please - slowly slowly!
As newsfie has always said on this forum - 3 weeks is the telling time - and you are nowhere near that. You really have not seen what this new pup is all about in this short period of time that he has been with you. If the two are having spats and disagreements now at this early stage - then changing things totally around for Mojo will not be the way to go. The disagreements will only get worse.
If Bronx is happy outside sleeping of a nighttime - and he is safe and can't get into any trouble - then that is what I would do.
In the whole scheme of things - pups will live for how long ? - waiting a couple of weeks, months - really does not mean anything does it to have a happy family and pups ?